Wow, I started a meme!
A committee at work was writing a sample letter to faculty, and we signed it "Librarian X." Naturally, some of us started speculating that Librarian X must be a superhero, and at the end of the day I whipped up a picture of him on Heromachine to send out.
Here he is, fighting information illiteracy wherever it may occur: Librarian X!
Naturally, my colleague protested that he's male; fair enough, given the demographics of our profession. I was instructed to make a female version (Librarian XX, to go with this Librarian XY). I haven't gotten around to it yet. Maybe they're a duo?
The other members of the Library League that I know of:
Alter Ego (I like his steampunky edge)
Drop a comment if you want me to link you here. Ex Libris and Excelsior!
Edit: Created a Flickr pool! More librarian heroes there!