One of my pet projects over the last few months has been to program an electronic version of my card game, Check - The Chess Card Game onto the Palm (and other devices). I have been using Waba, an excellent micro-VM to do it. I'm just about there with a Beta which needs testing. If you have a Palm device and want to try it out, bring it along to CJUG on Weds 12th April and I'll beam you a copy to play with. (You need a colour device with 320x320 or greater resolution.)
Once I'm done on the Palm, I plan to port it to J2ME and run it on my phone.