GTMobile is a client of Google Talk that run on java phones. Current release has been tested under SUN WTK 2.5beta. It requires CLDC 1.1 and MIDP 2.0 support. Such phones like Nokia N70, Moto E680, SE W800, etc. GTMobile can automatically resize for any size of screen but not tested on real phones because I don't have such java phones.

Here is snapshot on SUN WTK 2.5:

Anyone who test this client on real phones please send me a snapshot, thanks!