I keep getting asked this question, so I bet others are asking as well.

Yes, the dates for PDC08 have been announced: 27 – 30 October 2008 in Los Angeles, California. Save the date, and clear the time with your boss, spouse, entourage coordinator, indoor Ultimate Frisbee league, and anyone else who normally has a lock on your coordinates.

No, no other details have been announced yet. I think that Microsoft focused on  TechEd 2008 at the moment.

But you can subscribe to the PDC event RSS feed so that updates are delivered straight to you.