It seems so stupid that this isn't on the PS3 aswell. I KIND of get the Wiiware thing, but to not have it on the PSN seems ridiculous. Is there any explaination for this? I'd love to play it, but I can't be doing with buying 1500 banana bucks just to play this.

it's.. a microsoft exclusive maybe ?

@Ahmad_Metallic: That would be my guess. Microsoft Madness?

There is an explanation to this. Short version: Sonys fault.
 
From supermeatboy.com:
 

Q: Why No Ps3!!!

There is an explanation to this. From supermeatboy.com
Short version: Sonys fault.
 
Q: Why No Ps3!!! A: Why wont this question die? We have answered it publicly at least 15 times but it just never ends. We Cant EVER do a ps3 version of super meat boy because when we were going into negotiations with publishers Sony was the only one who didn't express much interest in the game. We assumed this ment that they didn't want the game and decided to sign with Nintendo and Microsoft. Our contracts excluded any release on Ps3.

I recall at one point someone mentioned Sony didn't want to bother with it (thought it wouldn't sell well, I think?) and so Microsoft jumped at the opportunity to have it be on their platform and block it from ever being on PSN.