I must confess to not using Java much. Java games are OK, but the Windows Mobile phone can do much better than the Nokia Java games (which are advertised almost hourly on TV for 5 quid each). Anyways, I’ve added some Java games to the downloads section here and a few demo / utility Java apps here. Oh – also there’s a link in to the excellent Midlet.org, which has lots of FREE Java stuff for your phone.
Although this is more directed toward new Orange SPV C500 users (who have the Java Midlet Manager installed as default), I’ve written an article about how to install and use Java stuff on your handset here.