I'm the only one that has ever run Traveller T20 games at the Con, and did so for three years. I took last year off for personal reasons (even though I attended the Con), and came back to run, this time trying CT since the games were set in 1248. In all but my first year to do so, I have been the only one to run Traveller games of any kind at Gen Con, to my knowledge.
Sorry, wish I could do more, but I'm the only one that has stepped up to the plate. Psion did run a one-shot off the schedule a few years back, and that was fun. Perhaps someone else will do the same this year for ya.
If nothing else, swing by the CT games. I always like meeting people from the boards.
Take Care, And See You There,
Flynn