I've been looking at various SDCC galleries over the last week or so (having not gone there myself this year, as you know) and haven't come across too many interesting ones until yesterday when I found a huge cosplay (fans dressing in costumes based on their favourite characters if you didn't know) gallery on Maximumpc.com.
Then I found another whittled down version on Geekolgie.com that just presented the hottest babes of that larger selection which was very interesting indeed!
You have to take a look at both the links as there are some truly amazing sights to behold on them. Some of the costumes are truly wicked and some of the girls are jaw droppingly gorgeous (The Supergirls and Powergirl are the best of course).
Enjoy!