I played Tribes 2 for a little while (still on my shelf).
Ever play MOHAA? Fun as hell sniping people .
Global Operations had to be one of the better TEAM FPS I have played, but it never got the attention it should have and died out.
If you've been online gaming for a while then I know you have played Ultima Online (4 year vet here).
DAOC - bleh
Heard Planetside was good, but not sure if I'm willing to PAY for an FPS monthly. The only thing I'm kind excited for coming out that I've seen is WoW, Lineage 2, ROT, and MAYBE SWG if it turns out to be more pvp oriented.