This is apparently attack of the alleged PS3 Slim ads day... two retailers from two different sources claim they snagged pics of the upcoming ads.
Gizmodo (linked above) reports that they received photos of a 120GB PS3 Slim listed for $299.99 in a K-Mart flyer.
The story on the second set of pics supposedly from a Best Buy ad comes from http://thebigmanandgarrett.wordpress.com/2009/08/12/exclusive-ps3-slim-best-buy-ad-leaked/ who are reporting the following from their source, to quote:
"I cannot reveal my exact role, however, I can tell you that I work closely with the marketing department at Best Buy. This ad is a mock up at best of the ad to be released in just over two weeks.
I cannot comment on the http://www.neogaf.com/forum/showpost.php?p=16928825&postcount=3854 PS3 mock up as this is the material that we're working with. Many images are often used as placeholders. The final ad will be touched up for grammar, punctuation, etc. Hope this helps."
That being said, the general consensus thus far is they are fakes... all we can do is wait until next week to see if the PS3 Slim makes an appearance at GamesCom. If it does, then perhaps there may be some truth in them after all.
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