http://www.gamefocus.ca/?nav=new&nid=1939
"Jonathan Blow, developer of the incredible Xbox Live Arcade title Braid recently sat down with Game Focus and answered some questions.
He did let us know that a Playstation Network version may come later on after the timed exclusivity of the game ends sometime in the future. Jonathan also mentioned that a Wii Ware version just will not happen because of the download size of the actual game is just too large for the Wii’s internal storage, a complaint we have heard many times from many developers."
Potentially good news for people who don't have a 360.