On several different MySpaces, there were ruminations a couple of weeks ago that several castmembers were being contacted to appear on the next Challenge. Earlier in the month, several castmembers have indicated that they were asked and mulling over the offers.
Now, fans are busy scouring MySpace pages for any indication that a castmember has left for the Challenge. I've gotten several confirmations from various different sources that some castmembers have indeed left for the Challenge earlier this month.
No word yet on what the theme will be for this Challenge. Earlier this year, production indicated that they were intent on casting for Fresh Meat 2, so this could possibly be another Fresh Meat Challenge.