http://www.scee.presscentre.com/Content/Detail.asp?ReleaseID=4341&NewsAreaID=2
http://threespeech.com/blog/?p=346
the early launch of its compatibility site reveals that 1,782 of the 2,451 PS2 titles (in the SCEE region) available will work on your PS3
http://threespeech.com/blog/?p=346