Just in case you thought Fox's 'Glee' couldn't get any more geeky-yet-fabulous: Joss Whedon is directing an upcoming episode of the musical high school dramedy.The 'Buffy the Vampire Slayer' and 'Dollhouse' creator, who famously masterminded the all-singing 'Once More, With Feeling' episode of 'Buffy' and last year's online musical hit 'Dr. Horrible's Sing-Along Blog,' confirmed the news (first broken at EW.com) Monday on his own blog. "I'm going to do my best not to gush like a fanboy for eight straight days on set," Whedon wrote.



