For the crews who have not yet heard from MTV (and all the rest of you who are curious): I just received the following email from MTV:
"Nancy, can you tell them that crews have not been contacted either way, but they will be shortly. I'm following up with our casting directors to see when they're going to log calls to ALL crews, yeas and nays. I'll let you know when we hear back on that."
To me, this means that there are still decisions to be made and that the crews that have not yet been contacted still have a chance to make it to Season 3. So, good luck to all and hold on tight!