Just saw on TSN they've swapped Luke Schenn for van Riemsdyk.  Don't have a link yet.   Darren Dreiger said it's been in the works for a while, that he's a big body who doesn't always play that way.  They have also done this:
http://www.thestar.com/sports/hockey/nhl/mapleleafs/article/1216302--maple-leafs-trade-gustavsson-to-jets