Dairy Queen.

Dairy Queen kicks off fall with a special offer to customers who join the Blizzard Fan Club. Anyone joining the Blizzard Fan Club during September not only receives the club welcome "buy-one-get-one-free" offer, but also receives a $1 off coupon for the company's new Oreo Cookie Jar Blizzard. Current fan club members also will receive the $1 off coupon in their September Blizzard Fan Club email blast. The Blizzard Fan Club, launched by Dairy Queen in 2005, has grown to 2.2 million members, making it one of the most successful brand-based social networks. The company reported that Blizzard Fan Club members recently participated in an election for a new 25th birthday logo for the Blizzard. Dairy Queen reached out via e-mail asking them to vote for the logo that will appear on Blizzard cups and all other promotional materials throughout 2010, the 25th birthday of the iconic treat. The majority chose a logo design featuring a birthday candle creatively swapped for the letter "I" in the word Blizzard, bordered with a celebratory "25th Birthday" banner.