On the PS3 blog, Sony announced the release of a new PS3 model. This model will be coming out in two versions, with a 250GB and 500GB hard drives and a third one for Europe with a 12GB Flash Memory. The new models are claimed to be 20% smaller and 25% lighter than the current PS3. So in essence this is the "PS3 Slim Slimer".
September 25th - 250GB
October 30th - 500GB
Europe and PAL Territories:
October 12th (September 27th AU, October 18th NZ) - Flash Memory 12GB
September 28th (September 27th ANZ) - 500GB
October 4th - 250GB & 500GB