The news comes from Valve's GDC party, where Coulton took the stage to sing the song he wrote overtop of the GLaDOS vocals, according to Harmonix's Sean Baptiste.
No information about when the track might be released was given--only that it will be available as DLC in the future.
Except the ones who are dead.
Portal is shit and I fucking hate it. I hope people get so dis-interested in the game that the creators hang themselves...
Neh, RE Your Brains!