voidcore: As I mentioned, playing with the text settings in SkinStudio doesn't make any difference in skins where the username is invisible; it stays invisible whatever the settings. In skins where the username is visible, its position can of course be changed as you suggest.
jazzymjr: I'm not sure whether Vista as my OS makes a difference in the case of non-Vista WB skins; some have the username visible, some don't. As far as I can see, this isn't due to the skin authors having `chameleonised' the username.