Is it not possible to edit your username.

The only way to get another username is to make a new account sadly.

But I've got the perfect name for me...  :-(

If you email the Moderation/Administration team nicely, they may transfer the subscription from one account to another.  

It has been done for me previously.

So ask them nicely ;)

I will...  pretty please, with sugar on top, will be done! Thanks for the heads up!

So the only option is to purchase another subscription?