it is a shame for SeeSaw, I liked this service when it launched but lost interest as time went on, because they weren't developing any kind of capabilities which would allow it to work on a TV (personally I don't want to watch television programmes on my laptop all the time)
I've not got a PS3 so can't tell if it worked over their browser, but I'd tried to get it to run on the Wii and it wouldn't work with their very limited browser, and the iPhone/iPad apps were effectively declared no-goes on the SeeSaw forums, so was pretty much stuck to either spending 3hrs in front of a computer watching the old Dr Who shows, or don't bother and SeeSaw loses another potential customer of their limited service
it's a shame because they got onto Boxee which is "cool" but I'd say too niche for what they could have had, if at the very least they'd got some kind of deal with Virgin Media to host their stuff on VM as another front end into their system, but it's going now.... ah well, a great concept/idea suffers because of poor takeup of market technologies