I should also add that Black Rock Shooter, UTAUloid, and Kagerou Project cosplayers are also welcome since they have a close connection to Vocaloid.
Facebook Cosplay Page
Future Crossplays/Genderbend Cosplays
Future 2013 Cons
Anime Boston (Tobiichi Origami (Crossplay), Akito, Izaya, Len)
AnimeNEXT (Gaul, Senbonzakura Len, Riki (Girls School Uniform), Itsuka Kotori (Crossplay), ALO Kirito)
Anime Expo (Sandplay Len, ALO Kirito, Genis Sage, Kotori, Riki)