They've gone ahead and put together a full Wing Commander/DragonCon guest list page. As of this writing, there are 52 confirmed guest, with lots more to come. Some of the more famous guests confirmed so far include Bruce Boxleitner (Captain Sheridan), Brad Dourif, Walter Koenig, & George Takei. We'll have to get some Freelancers autographed. You can see the current guest list here.
Bob Burden: Creator, writer, and artist of the cult favorite The Flaming Carrot, Bob was also involved with the feature film The Mystery Men and is a bona-fide Atlanta-area comics legend.