Now this was a special moment at Comic-Con 2012.
During the Nathan Fillion panel at NerdHQ during ComicCon 2012, Zachary Levi had a surprise for Nathan. Apparently the day before he said for $100 for a kiss on the cheek, well the NerdHQ surprised him with someone who donated $1000.
He dipped her and gave her a kiss, then Nathan Fillion came out threw some money at him and planted a kiss on Zachary. After that Adam Baldwin came out and planted a kiss on Zachary as well. There was apparently lots of loving to go around!
All of the money raised at NerdHQ goes to Operation Smile.