I've gotta say, this was extremely impressive. Graphics were great, the interface was very good and the gameplay was creative. Its not very often you see multiplayer applets and you did a great job with this one.
Well done!

1 thing you may look at adding is a score board. Maybe show the connected users a Kill/Death score and maybe a win/loss score.
I had a great time and I definitely bookmarked the site.
Thanks!