Complete Costumes

Wash (Baby)
Firefly
Inara (Jaynestown Dress)
Firefly
Conehead Zombie/Sunflower/Crazy Dave (Family cosplay)
Plants vs Zombies
Professor Layton and Emmy Altava (Emmy is, apparently, now pregnant ;-P)
Professor Layton
Bulbasaur
Pokemon

In Progress Costumes

The Gentleman with the Thistle-down Hair
Jonathan Strange & Mr Norrell

Planned Costumes

Arnold Rimmer/Holly/Baby Lister (Quarantine/Hattie Hayridge/Ouroboros)
Red Dwarf