Halo 3 is NOT coming out on Ps3. Though I agree with Origin about saving a few extra bucks and getting a Ps3 and/or Revolution.
Halo is freaking OWNED by Microsoft. Microsoft owns Bungee. There "can't" be a way for Halo to be on Ps3. Unless Sony bought Bungee from Microsoft for 300 million dollars. Sortof like how Nintendo sold Rare for 300 mil to Microsoft. And Microsoft was majorly ripped off, cause Rare already had it's best programmers working at another company called Free Radical, which makes the Time Splitters series. =P So Microsoft = Nintendowned.
interesting...rumors flying everywhere about it
anyway
it's your BDD if you want to take a chance and risk your house going up in flames, go right ahead