The next major convention is Saboten, October 30-November 1 2009. Saboten tickets for this year are $35 online, they will be $45 at the door. It is going to be held at the Hilton Phoenix East/Mesa, and will have all kinds of stars like Steve Blum (Cowboy BeBop Spike) and Vic Mignogna (FullMetal Alchemist Ed).
Anime Expo will be July 1 thru the 4 at the Los Angeles Convention center.
March 12-14, 2010 ; see link below .
Erie Anime ExperienceSeptember 23-25, 2011The Avalon Hotel & Conference Center~ Look to the related link below .
There's a mini-Con on Saturday, Febuary 26 in Dallas. Admission is $20.
Sakura-Con is April 6-8 2012 In Washington State Convention & Trade Center in Seattle,Washington
SoDak Anime Convention is in Rapid City, and will be held on June 15-17, 2012.
The next Anime Convention is called the Monster Bash in Butler, PA. It's on June 26-28. Here's link to the page for other info and cons. Hope I helped. :) http://dactylmanor.org/fanboy/byarea/united.states-pennsylvania.htm ~Ryuzaki
Unfortunately as it is now December there are no more convention dates in Arizona
The next con in PA is in February Feb.24-26 2012 I'll be going myself so the site for info is MangaNEXT.org ( NOT .com .ORG)
um not sure but i think no game no life counts =)
Just about every Japanese pop culture or anime manga convention is a cosplay convention.
You can Buy them Online or at Anime conventions.. the anime Convention i wen to i got a Miku Hatsune Plush