InfoSpace Invites Poker Players to Face-off in the Hold'em Poker+ for Prizes Mobile Mega Tournament Championship; Stake your Claim as the Grand Champion and Play Poker with Robert Williamson III in Las Vegas.

BELLEVUE, Wash. -- Calling all poker enthusiasts -- InfoSpace (Nasdaq:INSP), a leading provider of mobile entertainment content, and ThwartPoker Inc., the world's leading provider of skill-based strategy poker, today announced the upcoming Hold'em Poker+ for Prizes(TM) Mobile Mega Tournament Championship. From May 16, 2005 to August 14, 2005, players can download Hold'em Poker+ for Prizes, published by InfoSpace Games, on their mobile phones and compete against other mobile gamers for prizes to become the Hold'em Poker+ Grand Champion. The Grand Champion will win a trip for two to Las Vegas to dine and play poker with Robert Williamson III, World Series of Poker champion and the host of Poker Royale on GSN. The grand prize will include airfare, hotel for two nights and rental car.

"With the Hold'em Poker+ for Prizes Mobile Mega Tournament Championship, we're taking one of our most popular games and allowing everyone to compete for a poker player's dream vacation," said Andy Riedel, vice president of game development at InfoSpace. "With the skyrocketing popularity of poker and the growing success of our 'For Prizes' Network, we expect this to be one of our largest tournaments ever."

Hold'em Poker+ is one of the most widely played mobile skill-based strategy poker games in the world. In this unique twist to traditional Texas Hold'em Poker, three community cards are first dealt followed by four rounds in which the players pick their cards based on desired face value. Played against virtual opponents, the object of the game is to skillfully put together a winning hand without being blocked, while trying to block a virtual opponent that might be building a better hand.

"Hold'em Poker+ for Prizes is an exciting twist for America's most popular game, Texas Hold 'em," said Robert Williamson III. "I am proud to launch the Mobile Mega Tournament Championship and I look forward to playing with fans on my cell phone."

The simple gameplay lends itself well to the mobile screen, allowing poker experts and novices alike to compete in head-to-head and weekly high-score tournaments. After three months of skill-based competition in the Hold'em Poker+ For Prizes Mobile Mega Tournament, the Grand Champion will emerge. Sony PSPs will be awarded to the Best Score Champion, the Best Average Score Champion, and the Best Ranking in Head-to-Head Champion. Other prizes include a $1,000 Amazon gift certificate, a $250 Amazon gift certificate, $100 and $50 gift certificates for poker merchandise, yearly subscriptions to ALL IN Magazine, and copies of the newly released poker DVD From the Kitchen Table to the Final Table featuring Robert Williamson III.

The Mega Tournament will be available across all carriers offering the Hold 'em Poker+ For Prizes game in the United States.

All winners will be announced on September 1, 2005. Full tournament details can be found on www.atlas-mobile.com.

About InfoSpace

InfoSpace, Inc. (Nasdaq:INSP) is a leader in private-label search, online directory and mobile entertainment. InfoSpace consists of two divisions - Search & Directory and Mobile. The Search and Directory division uses our unique metasearch technology to power a portfolio of branded Web sites and provide private-label search and online directory services. InfoSpace Mobile is a global provider and publisher of wireless content, including ringtones, games, graphics and more, as well as infrastructure solutions that help customers build stronger brands and generate revenue. InfoSpace Mobile distributes its applications through mobile operators, including Cingular Wireless, T-Mobile, Verizon Wireless, Nextel, Sprint, Virgin Mobile, Vodafone, 02, Orange, 3, TIM and Telefonica Moviles. More information can be found at www.InfoSpaceinc.com.

About Robert Williamson III

Robert Williamson III is poker's most popular player and commentator. He loves life, playing poker, and drinking fine wine. He has been featured on ESPN, ABC's Primetime Live, The History Channel, Fox Sports, and UPN's Ultimate Poker Challenge. Tune into GSN to see Robert III commentating his third GSN's Poker Royale series on Friday evenings. Robert Williamson III's poker accomplishments include 2002 World Series of Poker Pot Limit Omaha Champion, 2003 World Poker Open PLO Champion, and 2004 Mid-American No Limit Hold 'em Champion. He was named Card Player "Player of the Year" Omaha Champion along with being awarded with the 2002 Inaugural Brian Saltus Player of the Year. Robert III resides in Dallas, Texas with his wife.

About ThwartPoker Inc.

Founded in 2001, ThwartPoker Inc. is a developer, publisher and distributor of interactive card games, and is known for its casual, skill-based class of card games named ThwartPoker. The company offers the next evolution of traditional poker, made possible by its patented software that eliminates the randomness of regular poker - and replaces it with skill. ThwartPoker games are skill-based and therefore do not violate U.S. federal gambling law. ThwartPoker games are played at http://www.thwartpoker.com. ThwartPoker for mobile phones was made possible through the company's licensing deal with Infospace Mobile - that has titled the mobile version Hold 'Em Poker+ For Prizes(TM). The company is headquartered in Palo Alto, California. To learn more about ThwartPoker Inc., go to http://www.thwartpoker.com.

This release contains forward-looking statements regarding InfoSpace's mobile business and its Hold'em Poker+ For Prizes Mobile Mega Tournament Championship. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those projected. These statements are not guarantees of future performance and are subject to certain risks, uncertainties and assumptions that are difficult to predict. Factors that could affect actual results include the progress and development of the proposed Hold'em Poker+ For Prizes Mobile Mega Tournament Championship and the extent of consumer adoption and participation in the tournament. A more detailed description of certain factors that could affect InfoSpace Mobile's actual results include, but are not limited to, those discussed in InfoSpace, Inc.'s most recent annual report on Form 10-K, in the section entitled "Factors Affecting Our Operating Results, Business Prospects and Market Price of Stock." Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this release. InfoSpace undertakes no obligation to update publicly any forward- looking statements to reflect new information, events or circumstances after the date of this release or to reflect the occurrence of unanticipated events.