I've just released the source code to a mobile phone RPG at http://autrealm.sourceforge.net. I'm interested in hearing if it works ona variety of (MIDP 2.0/CLDC 1.1) phones. If you would be willing to check it out and post a bug report or write to the project mailing list if you have problems, it would be appreciated.
If you're interested in the game, it's all free software. There's nothing commercial here; just having fun writing a game, and hoping it'll interest others as well.