I was chatting those guys for a bit- they're in the planning stages of a photography book on costuming, which might have some cosplay photos. They seemed pretty new to the con circuit, so don't expect any online galleries of the photos they took
From what I remember, the photographer is David Holloway, represented in part by getty images:
(search for his name- he is based out of arlington) I don't have the pugin so I can't see his profile.
He has a webpage: onethousandwords.net
Thats pretty much the info I have- I told them to email me if they had q's, but I haven't heard back. You may see them in other area cons....