I found myself using some code over and over and constantly visiting this one site to get as3 keycodes, so I thought maybe the code I wrote might be useful to others. I really hope there's not already a built-in way to do this in as3 :-P

Mapping key codes to text names:

http://www.newgrounds.com/bbs/topic/1358795

EDIT: After some discussion in the forums, http://milchreis.newgrounds.com/ came up with a much more elegant solution.

Here's a .swf: http://www.newgrounds.com/dump/item/9db15013684d6c22005bc9f3335935c8

And here's the .fla (cs5.5): http://www.newgrounds.com/dump/item/d7d2f4bbb27686e35675e9bad8205cff

Also, the Labyrinth game is done, just waiting on the sponsor to launch it officially!