Hey Game loft has a twitter feed advent calendar.
Gameloft (gameloft) on Twitter
They are giving away freebies and what not. I just got Dungeon Hunter Free!
Free Android Games! Try Before You Buy - Gameloft HD Games
It is only good for today, but every day they are doing something. I will be checking the twitter feed daily and see if they offer any other goodies.
(looks like it is for 24 hours)
I haven't really tried Dungeon Hunter yet (Just got it 5 minutes ago) but any but it looks cool.