Update: RPGSite.net has now revealed that EA's official Russian Web site also lists Mass Effect 2 as being for Xbox 360, PC and PS3, however, BioWare has simply issued a 'no comment' on it.
To date, BioWare has neither confirmed or denied the existence of a PS3 version of Mass Effect 2.
However, JustPushStart.com (linked above) has uncovered a listing on retailer giant GAME's Web site for a PlayStation 3 version set to release on 10/01/2010 with an item code of MASSEFPS3.
The listing currently shows an unknown publisher and developer, and to quote:
"There's been rumor that Mass Effect titles will be ported to the PlayStation 3 but up until now, no official confirmation. Whether or not this is true is truly up to Bioware if they ever decide to put it on the PlayStation 3. As of now, we will have this as a rumor.
Mass Effect 2 is slated to come out early next year for the XBOX 360 and PC early next year."
More PlayStation 3 News...