Problem with that is, I don't think its in development anymore... you never know tho.
ET was of course the result of a cancelled RTCW retail addon - which was a bit pants, tho I am sure alot of us would have been happy to give a second opinion.
I really like this game because you get promoted to higher rank with more goodies the longer and better you play. I play regularly at the earthquake gaming servers and the McP server. I have tried servers that use custom maps and some of them are quite good. But this game does not start getting good until you know all the details of the maps and their secrets and hiding places.
I must be a real ET junkie - I usually get between 800-1200 xp for a 6-map campaign. The key is to work your way up in a category and then move to a new category. Medic is the easiest way to start building up xp and reach rank of lieutenant. My favorite is field ops because my reflexes are not fast enough to out-shoot someone in a close-up small arms confrontation, but I find really good hiding places from which to call in artillery and air support.