In case you're ever in the need of attending another comic convention, here's a cool list from the Convention Scene website:
You are not allowed to view links.
Register or
LoginAt first glance, most of them appear to be U.S.-based, but there are a few listed in London (KAPOW! Comic Convention) and Melbourne (Oz Comic-Con).
A smaller list from Wikipedia for your reading pleasure: You are not allowed to view links.
Register or
LoginAnother list that includes anime cons as well: You are not allowed to view links.
Register or
Login (This one is more worldwide!)