bardicverse on 18 August 2009
http://content.usatoday.com/communities/gamehunters/post/2009/08/kmart-website-reveals-listing-for-299-ps3-slim/1
Apparently K-Mart put up a listing for PS3 Slim at $299, but took it down, and Sears did likewise. Maybe there is some verification for the PS3 Slim rumor coming soon.