I just noticed that this is now available on the PSN store. I'm downloading the demo now. I've heard a lot of talk about it but I saw it in action last week and it wasn't what I was expecting.
Still I'll try the demo and see what it is like. Anyone else tried it?
I was playing it for a few minutes earlier and it didn't do enough in that short time to convince me to buy the whole game. Chris is right, it is really hard. There is a jump about 2 screens into the game that I can't get past.
There is a cool video comparison of the old and new version of this game here. The video shows how to get past the jump that I"m stuck on. I might go back and give the demo another go.