Here are some links to other Java game sites:
JavaGamePlay.com -- this site has some excellent 3-D Java games like Tank Hunter and WarZone2
David Brackeen's homepage -- this site has two excellent 3-D java games, Scared and Race3D
Here are some links to other Java games:
Stoneroids 98 -- An excellent 2-D Java game. As far as 2-D Java games go, this one's at the top of the list.
Jump -- an excellent 3-D platform-style Java game where you explore colorful 3-D worlds. Unfortunately, however, you're now going to have to sign up for GlobalFun to play it.