This post was updated at 11:56 AM with comment from Microsoft.
Expo will disappear on July 31, a notice on the site explains. Until then, no new listings can be posted or extended, and no new accounts can be created. Microsoft representatives responded on Friday with a statement from the company: "We have learned a tremendous amount from our experience with Windows Live Expo and believe this decision, while a hard one, will serve to more effectively focus our resources towards other priority online service investments for our customers."
The most recent post on the Expo blog is from last September.
Online classifieds continue to be dominated by Craigslist, a scrappy start-up with a hippie attitude and a user interface worthy of 1997. The company is currently ensnared in a legal tiff with major investor eBay over the auction giant's in-house classifieds site, Kijiji.