http://nunshavingfun.livejournal.com/287958.html has photos of the Stargate bus, as well as several shots of David Hewlett at the autograph table, and assorted other photos from the con
http://limmenel.livejournal.com/960060.html - scroll down through various photos to find a shot of Teryl Rothery signing at the con
http://s210.photobucket.com/albums/bb283/jumper13_photos/ComicCon2007/ has added a gallery from both panels
http://roadrunnerdm.livejournal.com/73100.html has up two galleries:
1) Stargate SG-1 Panel (54 photos) - http://pics.livejournal.com/roadrunnerdm/gallery/0002z2tw (Amanda Tapping, Ben Browder, Chris Judge)
2) Stargate Atlantis Panel (46 photos) - http://pics.livejournal.com/roadrunnerdm/gallery/00030bxb (Joe Flanigan, Daivd Hewlett, Amanda Tapping, Jewel Staite)
Lastly, the Pittsburgh-Post-Gazette has several articles on Comic-Con at http://www.post-gazette.com/pg/07207/804041-42.stm. One excerpt: I was determined to get my TV geek on and get a good seat at the "Stargate SG-1" panel, where there was exclusive footage of their straight-to-DVD movies coming out next year. I got a good seat -- well, decent, actually. I was over an hour early in an auditorium that seats 5,000, and about a third was already filled when I got there. It was packed by the time the cast arrived. More at link above.