Windows Live Expo has just announced a new update to the service, including integrated payment via PayPal, job listings via CareerBuilder, featured ads by AdMission - initially in the real estate and autos sections, better search, and tighter Messenger integration – showing you "all the things your friends and family are listing – right within the Messenger client!." 

New Updates announcement on the Expo Team blog

Take a Tour of the new Expo

Windows Live Expo