Thru DAE
we got a 2 bedroom unit at MacDonald Vilacana for mid-May. No problems with the exchange and we enjoyed the resort.
Within the past couple weeks I saw a 2 bedroom L'Ermita on RCI for June, 2010. We really liked the town of Mijas Pueblo where this resort is located. I suggest you put in an ongoing search for only the resorts you would accept, but continue to search RCI often since things slip thru the cracks.
There were also Extra Vacations for less than maintenance + exchange fee, so check them out too.