Maybe it can/will be changed:
Adding or removing text to/from a username is particularly likely to be accepted because it doesn't make it significantly easier for someone to scam. Your identity isn't really changed. I tend to ignore requests for complete username changes except from veteran members. (Even then, it's one of the lowest-priority requests I receive, so it can be forgotten. I have kind of a "leaky queue" for forum work -- if I don't get to a request in a couple of days, I usually drop it.)
Thanks for quoting that. I might consider contacting theymos about it and if it gets changed then thats great if it doesn't I understand why he couldn't do it. I always thought you needed to purchase donator status to change username.
EDIT: It got updated even though I didn't send a message yet. Thank you very much this has made me a lot happier that I don't have to stare at that "b".