The Eidos Forums have a follow-up to the vague report that Deus Ex 3 is to be a PC exclusive (thanks Joystiq). Here's word from Eidos-Montréal that suggests this is erroneous, though they don't quite come out and say that:
Only the PC version has been announced so far. The magazine coverage we had last year were all PC: Joystick (France), PC Zone (UK), Gamestar (Germany), PC Guru (Holland), PC Powerplay (Australia), Total PC Gaming, etc. I dunno where that website is getting its info from!