Hex Editor

Are you tired of programming in text? Do you like to save numerical data in ASCII format? Would you like to confuse your friends with seemingly meaningless "text files"? I you answered yes to any of these questions, then you need a hex editor.

Anyway, I though it would be fun to make a hex editor. Use left Ctrl to save and left Shift to quit; the rest of the controls are as expected.
I hope someone finds this useful. Suggestions and constructive criticism are appreciated.

Screenshot
http://www.freeimagehosting.net/vqaom

Code
http://pastebin.com/SpySi6uB

EDIT: Updated to make the cursor more convenient.
EDIT: Added a status bar (see screenshot)

Nice but… uhhh…. well what do you want to edit?? And maybe you can make a line that shows the decoded stuff on the right like a real hexeditor??
Well good job!