For a game in a series with such a long history, and such a passionate fanbase, Command & Conquer 4 has been humming along under most people's radars. Something that should change pretty soon once the beta kicks off.
C&C4's community manager has posted on his Twitter account "C&C 4 beta will be going PUBLIC very soon, every RTS fan in the world can give CNC 4 MP a test-drive".
With the game due out in March, "very soon" really does mean "very soon". Good to hear it's a public beta, too, so everyone (not just those pre-ordering the game) can get in on the action.