Iron Totoro and Hawkeye
A Total Fangirl
The Littlest Nightcrawler
Amy Ratcliffe of Adafruit is at Dragon Con in Atlanta, where she's snapping photos of some really creative and skilled cosplayers. You can see more photos that she's taken here and here.
I adore the Fangirl outfit. That's a fantastic pun.
I've got an even more pun-tacular costume in mind for next year, I can't wait!