I've gone to Devcon the last few years, but am not a long timer like some. Troi has a web page at Troi Automatisering DevCon photo archive where they keep track of locations of past Devcons. Below is a screen shot of the page. I didn't realize this is the first time Devcon will be at Las Vegas. Thanks, Peter, for keeping the history. It is interesting. I look forward to being in Las Vegas this year!