PDC '07 didn't come off as most of us had hoped, but PDC '08 is on the way. For those that don't know, PDC (short for the Microsoft Professional Developers Conference) is usually held every other year in LA. PDC is "the definitive Microsoft event for software developers and architects focused on the future of the Microsoft platform".
SO - Mark your calendars for Oct 26-30, 2008
They've also got an RSS feed on the site so that you can keep up-to-date on all the goings on. Hope to see you there!