The interesting news here is that Star Trek 2 (or whatever it'll be called) laid claim to a June 2012 release date last week. That would put Quinto back in the Spock ears sometime next year. If Quinto wants a two-year break from Spock, he's simply going to have to find a new job. Paramount needs to get on the phone with him quick and work this out.
I'm certain he's contractually bound for another Star Trek film, whether he wants a vacation from Trek or not. Surely, he, of all people, would understand that a Star Trek film without Spock, this early in the renewed franchise, would be highly illogical.