Nice!
I don't have a photo to hand (currently in the middle of a house move) but I have Joss Whedon's autograph, and it'll take pride of place in the new house. I was at Comic Con a couple of years ago lining up for the screening of some show (could've been Glee?) and was busting to use the facilities. My then fiance - we got married the day after Comic Con! - told me to go pee, so off I went and who was at the next urinal? Yeah...
Of course, it's bad form to interrupt another gent during his... ummm... business. I finished up, washed my hands and went back to the line. And then Joss Whedon cut back in line a couple of people down from us. Seems he had mates holding his place in the queue, so I decided to take the chance, grabbed a Dollhouse promo card I happened to have on me and humbly asked for his scribble. We chatted for a few minutes and he was genuinely charming as all get out. And he'd washed his hands too. Good chap.