Forum Moderators: phranque
If there's decent PR or a good amount of links to the old you might not want to let them expire, they could end up in the wrong hands.
If so, you might want to take a look at this [linuxgazette.com...]
You may end up with an infinite loop using Redirect, because it can't tell if you are already in the correct domain or not. See message numbers 6 & 7 in this thread [webmasterworld.com] for a method of redirecting all domains to one "standard" domain, while retaining the originally-requested page name.
You'll also need to try to get as many external links as possible changed to use your standard domain name. Retain the others for existing "branding" only.
Jim