If not, does any of you know why?
Is SuperMeatBoy coming to PSN?
No. Team meat originally developed it for PS3, 360, Wii and PC. They submitted early versions to all of the console manufacturers. MS and Nintendo were both interested in it, and sony didn't show any interest whatsoever and were super slow at getting back to them. Microsoft wanted an agreement that it wouldn't be released on the PS3 as part of their deal with Team Meat, and since Sony weren't showing any interest, they agreed.
It's on PC though, and the minimum system requirements are super low, so unless you have a PC from the dark ages it should be able to run it. Just get it on PC.
This edit will also create new pages on Giant Bomb for:Beware, you are proposing to add brand new pages to the wiki along with your edits. Make sure this is what you intended. This will likely increase the time it takes for your changes to go live.