...coming out January 2007.
I've googled it, but couldn't find anything that would confirm it, but yesterday, during the Amazing Race, I switched back to Nick during a commercial (I think Romeo was on) and voila! Nick was taking a commercial break, too. And the commercial was for SBSP Season Four, Volume One. But at the end of the commercial, where it showed the product, and said something about (I think it was) the Yellow Album, there was in small, white letters next to the DVD that said "Season Four Volume Two out January 2007."
If anyone else has seen this commercial, then yeah. If you see it, catch the end to see this part.