According to Shingo "Seabass" Takatsuka's interview with 1up.com recently, the PS3 version of PES could be shipped as early as Spring 2007 (but not before Jan 2007. The reason for the delay is 1) The deal with MS for exculsitivity until the end of 2006 only - not 12 months and 2) getting used to the PS3 dev-kits.
The PS3 version will be the same as the 360 version. It will be PES6 and not PES7 and will feature the same graphics & gameplay engine. Anyone reading this thinking that Konami have been beavering away with a 2nd development team for PS3 only....please feel free to remove your lips off of Ken (Sony's Boss for those not in the know!) Kutargi's ASS!
This information in the 1st paragraph is from the Horses (Seabass's) mouth. The info from the 2nd paragraph is by me and anyone else with any sense in their heads!