Cosplay Links Around the Interwebs
AnimeNewsNetwork.com: The Anime News Network
Look up everything anime in their extremely impressive (and growing) encyclopedia or get up to date with everything that's happening in Anime and Manga.
Cosplay.com: The International Cosplay Community Website
Join the International Cosplay Community and Network with cosplayers from all around the world on this Cosplay-Social Media-Hub.
Cosplay in America
Cosplay in America is a new photo book showing fantastic photography of cosplayers at conventions all over the US. I think it's great that a photographer has chosen to do a book on cosplayers in the States and if you are a cosplayer in the US you should definitely check it out.
DannyChoo.com: Your Portal to Japan (and the Tokyo Stormtrooper)

Danny Choo - The Tokyo Stormtrooper
My favorite website has just about everything you could want to know about Japan, the Otaku Subculture, and the Tokyo Stormtrooper himself, Mr. Danny Choo. Danny is an inspiration to me and probably a million other bloggers out there. Check out his site, but be warned, you will become a subscriber before you leave his site! It really is that awesome! Recent News: Danny Choo and Otacool are putting out Otacool 2 which is completely dedicated to cosplayers from around the world and shows some of the best photography that users submitted themselves to the project. Definitely worth checking out through his site or the Otacool site.
Links to some Anime Conventions in the United States

Final Fantasy Cactuar Cosplayer at Anime Boston 2007
www.animeboston.com: Anime Boston: Boston MA
I have attended Anime Boston since 2004 and can say that it is one of the best conventions I have ever attended. I'm actually pretty sad to be missing it in 2010 because the theme will be future/cyberpunk/mad science and that's just awesome!
www.connecticon.org/: ConnectiCon: Hartford, CT
www.kawaii-kon.org/: Kawaii Kon: Honolulu, HI
www.animelosangeles.org/wp/: Anime Los Angeles: Los Angeles, CA
Find a list of more anime conventions in the United States here.
A fairly comprehensive list of anime conventions around the world can be found on Wikipedia here.