I can play my PS2 games on the PS3.
did you buy an early one? .... I know they removed the capability after a while.
edit: apologies!
The 80 gig can still play PS2 games (the 20, 40, and 60 gig ones can not) (unless you got them early).
"In addition to all of the features of the 20 GB model, the 60 GB model has internal IEEE 802.11 b/g Wi-Fi, multiple flash card readers (SD/MultiMedia Card, CompactFlash Type I/Type II, Microdrive,[54] Memory Stick/PRO/Duo), and a chrome coloured trim.[44] In terms of hardware, the 80 GB model released in South Korea is identical to the 60 GB model released in the PAL regions, except for the difference in hard drive size.[55] Like the South Korean and European models, the North American 80 GB model also excludes the PlayStation 2 "Emotion Engine" CPU chip.[56] However, it still keeps the "Graphics Synthesizer" GPU.[57] Due to emulation of the "Emotion Engine", the level of compatibility was reduced[56] (see PlayStation 3 games - Removal of hardware support for more details). The 40 GB model has two USB ports instead of the four USB ports on other models, and does not include a multi memory card port, SACD support, or any backwards compatibility with PlayStation 2 titles.[56][17] This was due to the removal of "Graphics Synthesizer" GPU, which stripped the unit of all PlayStation 2 based hardware.[45]"
reads ugly, but the info seems to be there.