In reply to Chris the Tall:
If this does happen, my suspicion would be that Specialised are chucking in a load of money to allow OPQ to offer the same sort of cash to Cavendish - thus letting him earn his rewards whilst not having a team compromised by having to work for Wiggins at the same time (note that Wiggins is already trying to position himself for this by saying how hard Cav would find it next year with the Olympics and the Tour so close together...)
I really hope it comes off, actually - Cavendish has always seem to be much more European in outlook than Sky are. I don't think it's a natural fit.