Yea, the game isn't exactly targeted at PS3's core market so while I don't think it will FLOP, I do think it will end up as a somewhat successful cult title instead of a huge blockbuster. It probably WOULD sell better on the Wii, but that's Nintendo's mistake, not Sony's.
As far as worrying too much about the game focusing too much on user-generated content, I don't think there's THAT much to worry about. Sure there will be a lot of BAD levels, but if Media Molecule and Sony are smart, they'll allow users to tag levels with such descriptors as 'super difficult' or 'no goal'. While certain individuals will use trickery to get their poorly crafted levels to the top of the list, it's possible that the user-base will be large enough to prevent it from happening too often.







