Spore now has an official release date: September 7, 2008. I’m guessing this will be Mac/PC only for launch, with consoles to come. Previously: EA confirms that Spore will be on the Mac, and much, much more.
Update: more info, via Ars Technica. N’Gai Croal has an interview with Will Wright, confirming that there will be versions for Mac, Windows, DS, and cell phones, and also an interview with producer Lucy Bradshaw.