You have to open up a ticket...quick links > ticket system... Only the admin can do it, and name changes aren't a high priority item, so it could take quite awhile...
I can pretty much GUARANTEE that you won't get a name-change. It's only usually done for people who have been here AT LEAST a year. You joined this month.
I should have given it more thought when I chose a user name. I hope he will consider my request, but in the mean time, I guess I'll just have to use this one. I don't want to break any rules.