Yes the Canadian Affair / TCX contract finishes at the end of the summer 2011 season. Effectively the contract takes up 2.5 A330s hence 3 aircraft going back to the leasing company this winter.
The ex-MYT A330s are staying in the fleet, as mentioned these aircraft are on far more favourable lease deals (mortgages actually) compared with MB/MC/XA which are apparently quite a bit more expensive.