http://www.quakelive.com

Him too remind everyone wink

Quake-live can be played in an open beta version now.
its takes some time to get set up, but I managed it today.

Its basically Quake III Arena played in your Browser.
Really cool system, and classic gameplay.

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html