Jeopardy! called

I've been invited to an audition in Culver City for people who passed the Jeopardy! online test. Until today, I had no idea I'd even passed the test, which IIRC was given almost a year ago. I'm flying to LA on March 11 for an audition on March 12. They originally invited me February 11, but I'll be in Hawaii that day, so I asked to reschedule, and fortunately they said yes.

If anyone has been to a Jeopardy! audition at the Sony Studios in Culver City, what is the process like? What should a 40-something white male nerd wear? How should I try to differentiate myself from the scads of other 40-something white male nerds who will no doubt be auditioning that same day? I've been on one game show (the now-defunct Merv Griffin's Crosswords) a couple of years ago, but they were desperate for contestants (small money, lots of shows per season, no name recognition), so it wasn't hard to get on once I passed the written test. Jeopardy!, I'm led to believe, is much more selective.