The problem with CAS contests (and other contests like CAT and Prov) is that the judging is completely subjective and opinion based. It's really hard to pull off those contests and feel like there was no bias in the end. With CAP, it's easy to make up some rules and specific things that people have to follow. Not so much for others.
You guys are welcome to organize your own but I don't think I will ever host a CAS, CAT or Prov contest.
That said, I would love to start a new version of the old "Get There" challenges. Most of you probably never participated in a GT but those were a blast!