Anyone hosting a free mw2 challenge lobby, june 2011,xbox360?

My gt is viciousvEg and was 9th prestige level 70 with all titles and emblems and titles, and camos and attachments when i got tricked into getting 11th. It would be great if someone sent me a message saying when they could do the lobby, either on xbl or by answering the question. I wont invite any friends or recent players. Thanks :)