I have the opportunity to buy an 80GB PS3 for £130 (normal price here is £299 with a game or 2) but I'm still not convinced that it's worth it.
I already have a 360 and I prefer the controller so 99% of the time I will get multi platform games on that. None of the exclusives that are already out interest me all that much (except maybe Drakes Fortune). I like the idea of blu-ray, but unless it comes down in price significantly I won't be buying many at all.
I'm worried that I'll regret passing up on the deal later on when something good comes out - although I'm not sure what's coming out aside from Killzone 2.