I really, REALLY like Quake Live. It’s fun, simple, and did I mention that it’s fun?
I don’t understand how it works. It’s completely Lag free, the graphics are superb and it has everything you would expect from a modern day shooter. Statistics, matchmaking, friend tracking, in game chat etc. I’m really impressed, because it all works.
If you can find a way of getting into the beta, then I recommended you exploit that right now. If you can’t, then wait for the release. You won’t be disappointed.