I have done this as I had to many different user names on the various sites I use, obviously lacking an online identity that everyone recognizes.
Previously, I had at least the following:
Nokia sites: KiwiN97
That's just off the top of my head of the sites I frequent most often...
Now, every site in that list, I have the user name euanandrews
Took a while to convince Trademe to make the change, but they did eventually.
Geekzone was instant, excellent MF, Micky at nokiausers has just made the change for me, no issues there either...
And both Qik and Twitter required no process or requests, its an easy change as long as the user name is available, so no dramas.
So now, Bartender, you have the 'Bartender' name to yourself bud, no more confusion.