I too was at the Comic-Con on Friday. My brother and I eat lunch at the pub/restaurant in Marriot next door to the convention center. We sat on the indoor patio outside the restaurant proper; seated to the far left of us was Jeffery Combs also having lunch. Neil Gaiman was at the table to our immediate right.
I'm not the type of person to approach actors or writers, especially in the middle of lunch, and strike up a conversation. But I thought it was cool to have two such top notch people in their professions next to us.