The perverse part of me (quite a big part, if I'm honest) wants to go through the comment history for xandam and upvote the username into the stratosphere.
Voted down the post 'cuz I'd rather not do this ever again and getting 50 karma is really not that hard, but voted up the new name.
I decided the new me needs a different user name (megalomania, mostly), but I see no way to do this automatically. No important posts will be lost - I am mostly a lurker for now. So I am switching xamdam->Dr_Manhattan and requesting some karma donation (please upvote the comment below), at least to 20 points. xamdam's current carma is 712. Thanks!