is it easy to change your apple id?

[bobinmurphy]

I've got two identical AppleIDs (thanks Apple), but each has a unique password (no really thanks Apple). One appears to be used for e-mail and one appears to be used for everything else, although it seems almost impossible to tell which is which. Anyway, I've searched and searched and as far as I can tell there is no way to permanently delete, remove or change an AppleID once it's created. You can however change the e-mail address associated with it.