Wow, this thread is so old.
Anyways, at most mid-sized and larger cons I see a couple of Hellsingers. Last weekend, I found a Seras and a Walter at ALA. I wish I had run into them while I was wearing my Integra cosplay, but oh well. One can't have it all.
ALA (Artist Alley, Rum Party Staff)
Condor (Dealer's Hall)
Anime Conji (Artist Alley)
Escondido Ren Faire (Volunteer)
Gaslight Gathering (Guest Panelist?)
San Diego Comic Con (Attendee)
San Diego Pirate Faire (Volunteer)
Conjecture/Conchord (Dealer's Hall?)