The last discussion panel on Friday I went to was "Adventures in Costuming", where the panelists were Cathy Raymond (Eric Raymond's wife) and Jay Maynard, a.k.a The Tron Guy. More of him and his costume can be seen in this photo gallery. I had to leave this panel halfway because it was late and Erika was getting tired. Anyway, it was mostly Jay Maynard talking about all the fame (or infamy) that the Tron costume brought him. After a press story about him was posted on Slashdot, he braced for negative comments to come rolling in. He expected comments such as "a fat guy shouldn't be wearing spandex" and... by golly, he got them. Several hundreds. But there were also a lot of people who said his costume was cool. He appeared some television talk shows. Even Howard Stern contemplated inviting him to his radio show, but decided that the story won't make enough impact without the visuals.
Here is a much more detailed article about a similar panel at Linucon 2004: Costuming 101. It featured The Tron Guy, Cathy Raymond, and Kim Kofmel. That discussion was enlivened with all kinds of titillating details from the costume history.
In the picture (click for a bigger image): The Tron Guy drinks mundane beverages like the rest of us.
Read more about The Tron Guy on my web site.