The thirteenth episode of Gobbledygeek airs live tonight at 10:30 PM EST right here. Today just so happens to be Sir Paul McCartney’s 68th birthday, so we’ll be discussing his best work, both with the Beatles and without them. If you have a favorite McCartney song or memory, why don’t you go ahead and write into us? If you do, we’ll read your e-mail on the show (during the live part now, not the bonus hour!).