The latest edition of Command School has been released by EA. It features Kane's Wrath strategies exclusively and gives some nice insight into tactics that might pop up. You can get it from the official C&C site
Also, Executive Producer of Red Alert 3, Chris Corry, granted an interview to IGN:
IGN: Red Alert 3 was recently revealed. It's been a while since the last one, hasn't it?
Chris Corry: There actually hasn't been a Red Alert game for a little while now; it's been seven years. It's kind of interesting reintroducing the world to Red Alert. For those who are already familiar with Red Alert games and their place in the C&C universe, certainly Red Alert 3 is going to be everything that the hardcore fans have been looking for. It's going to have that trademark, light, humorous, fun, Saturday matinee popcorn feel to it, with live-action cinematics and all these great actors chewing up the stage.
You can read the full interview--it's a pretty good one and also includes three screenshots--at IGN