Had to dig way back to find the http://www.gamesas.com/topic/1339663-wipz-skyrim-script-extender-skse/page__st__150, so far no word from the team on what to expect in the next release. At the moment, I don't think there is any way for SKSE to hook into the CK, so there's no way to compile scripts using any custom SKSE functions that may exist.
I think there are a whole ton of form properties that it would be nice to see exposed - I got all excited when I saw "game.getplayer().x" in a script in the CK trailer, but it turns out an actor's x, y, and z are just about the only properties scripts have access to (unless the CK documentation is extremely incomplete.)