can username ever be changed?

I did't read all that I should have before I jumped in and signed up--and I wondered if there was anyway to change a username? I'd like to shorten it to just pj--can't remember if I orignally tried that and was turned down.

I realize I could just use the number, but that seems so.....cold.

thanks. I only found you less than a week ago, and I've learned tons already. Tweet