You are now able to sign up for the Quake Live beta.  Just head over to http://www.quakelive.com/ and just type in your e-mail address and hit submit.  Then if you are selected to be in the beta for the online browser based game then you will recieve an e-mail.

 

 

Quake Live, formerly Quake Zero is a free multiplayer version of Quake III Arena.  This is in a new line of free muliplayer trends in gaming.  Although some other companies making these new free multiplayer games will not feature in game advertising, Quake Live will.