Short form we used here for pixel and vertex shader in v3?
Yeah, I know - I just love the 'community logic' involved:
Mark: 'It'll require a 6200'
UserX: 'It'll require SM3'
UserY: '6200 cards don't do SM3'
UserZ: 'Therefore, my 6200 isn't supported'.
Frankly, I don't have a clue about SM1/SM2/SM3 - I was just guestimating the level of card you'll need to get decent shader instruction count, texture accesses and of course performance.
The bottom line really is this'll all be quite experimental, and if you wanna be along for the ride get yourself a grunty card/driver.