Brian said:
http://www.steamfriends.com/action/p2_articleid/1046
Word up? I’ve heard from some people in cevo and some of the admins for the league there that css would be moving to the TF2 version of the source engine later this month, new netcode and such. Wonder if this will be coming with it. Hopefully they will fix basic *edited* like sticking through walls, crab walking, objects obstructing bomb defusal and exploiting interp.
There’s never been any doubt about CSS going to the orange box codebase. The only question was when. 
Heh. It would happen when I’m so close to being done too. Oh well, such is life.