Earlier this May, supposed "leaked" photos from a Chinese plant showed what's reported to be the PS3 Slim. The German Amazon site now has a listing for "PlayStation 3 Konsole slim".
Googling the product code number does not show anything else but this listing on Amazon.de.
Retailer listings of unannounced products are always fishy. Ditto for this.
PlayStation 3 Konsole slim [Amazon.de Thanks, Daniel!]