Thanks! I'm afraid the autorigger will not be bundled with messiah, we're third party developers (we were on the beta but not actually a part of pmg as it were). We're working on something new and very exciting as well though, but it's not quite ready to show everyone yet.
I'll tell you the reason I'm excited about the hair module is that I do a lot of character work. And where characters are concerned there are certain things you really need the render engine to do well. SSS, is one of them and, although I've made due without it so far (and I consider having saslite as being without a solution), Hair is another. Messiah3's new render engine is capable exactly where lightwave falls down. I still have lightwave and still use it to render from time to time (FPrime yay), but Messiah3 is actually a better engine for some things, and so, I use it for those.