With apologies to Carole King: "Now it's too late, bayyybeee, now it's too late, though we really did try to make it..."
If you were waiting until the last minute to get your reservations in for Apple's Worldwide Developers Conference, aka WWDC 2008, you're out of luck. All available spaces at Apple's annual developer love-fest have been taken, so you'll have to wait until next year's event to get your fix of sessions and labs.
That also means you're going to miss out on the Steve Jobs keynote address, which you'll hear about within minutes of it happening anyway. Don't procrastinate for WWDC 2009!
Thanks to Chris C. for the tip!