Via Forum Nokia post, I came to know about the MoMinis mobile game contest. Of course, IMGA is also open and accepting submissions 🙂
Getting back to MoMinis, the game rules are listed here and requires you to use the Mo’ Minis studio tool for game engineering.
Whereas, at the prestigious IMGA contest, you can build your game on / for any mobile platform like java or Flash Lite or anything deployable into a phone. And remember that IMGA is analogous to Holy grail 🙂 The biggest game development competition and hopefully I have my game ready by then.