CK is not on Steam, it's on Gamersgate. It was half price recently, surprised they didn't do an offer to tie in with the announcement.

http://www.gamersgate.co.uk/DDB-CKDV...omplete-bundle

The Civil War game is on GG as well, though I haven't played it. It does seem interesting and I'd also be interested in hearing from anyone who's played it. I've been looking at it for ages and never taken the plunge.