There is no way for you to do this. If you have a compelling reason (ie extraordinary), I can do it for you. However, for obvious reasons, I don't want to get into the habit of changing people's user names just on their whim. Its a manual process for me.
It's a pretty lame username, that I had no intention of useing. I was so pee'd off that the usernames I was trying where not working, I just typed this out. With a 1.
I think you need to go into MySQL or somthing and edit the name out, it may be a bit long, but if you can, I would really appriciate it.