Over at Neowin.net, there is a heads up of some new Microsoft happenings including
Messenger Marketplace[Via seattlepi.com]
You heard it here folks, MSN Ebay is here! Buy and Sell within social network, also list wants and share recommendations. List items you want to sell, things you are looking for, and your recommendations. Your buddies notice new items you’ve listed when they login. They can either buy, sell or refer you to one of their buddies. It is like eBay except with people that you already know and trust directly (or a few degrees out).