Eurogamer.net received information from a trusted source that as early as October a 250GB PS3 may be on the market in Europe. In the UK it will be bundled with either Uncharted 2, Assassins Creed II, or Gran Turismo 5 and will cost £299.99. Due to the separate release dates of each game, bundles may arrive at separate times. Spain will be receiving a FIFA 10 bundle for €350.
Sony has yet to officially announce anything related to the 250GB PS3 slim so at this time its still considered a rumor, but it looks likely that this information is most likely true.