Will stick up the URLs I found this morning before I head off for work ....
http://adventuresinscifipublishing.blogspot.com/2007/07/comic-con-pictures.html has put up some images of each of the SGA actors (Joe Flanigan, David Hewlett, Jewel Staite, Amanda Tapping
http://blogs.mediavillage.com/sci_fi/archives/2007/07/all_hail_comic.html - Stargate Atlantis was also well represented at the MGM booth with cool flashlight key chains and posters from David Hewlett's movie A Dog's Breakfast. They also handed out Outer Limits mouse pads and posters from the Amanda Tapping's project Sanctuary. Apparently there was a cool fan that spelled out the website name but I never saw it.
http://lilferret.livejournal.com/35852.html has a fan's brief account, photos (one of SG1 tenth anniversary plate).
http://dragontamerno3.livejournal.com/172304.html talks about the free buttons handed out by MGM (which are now on ebay<G>) as well as having SG-1 'tattooed' in their forehead in bright purple. I'm sure it's washable. ;) However, at http://dragontamerno3.livejournal.com/172262.html talks about the autograph line.
Just a note, to find ALL the Comic-Con posts, simply to to the TAGS column at the right, click on COMIC CON and it'll pull up all the posts.