I've a new favorite:
Battleforge!
I never believed i can love RTS that much but battleforge (official a MMORTS - massively multiplayer online realtime strategy game) made me addicted!
I was involed in the beta and i had really a lot of fun with this game. It has a PvP and a PvE mode, you can use cards to create your playing deck.
The game comes out this days. I think the servers are up from now on.
More Infos here:
http://forums.battleforge.com/forum/
If interested there is a demo mode where you can play with a standard deck. You just need to install the client: (~2,4 gb)
http://forums.battleforge.com/forum/...ead.php?t=5317
(you need an EA account for login)