Their most popular and social game was Frontline Command, they release Frontline Commando D Day (a WW2 germany invading game) this week and it will be their most successful title to date.
Activision Blizzard already used Glu to make several of its Call of Duty games on the iphone/ipad several years ago and already has the relationship with Management. They also have 4 Billion dollars in cash. Glu's games fit perfectly with Activision Blizzard's, and it will only be a matter of weeks before it happens. I think the buyout price will be $7-10 though, anything more is a little much.