I haven't played around with it enough to give it a review, but I applaud the thinking behind WebCite, at least.
The idea is to combat link rot (or wingnut bloggers, who disappear their posts after being proved wrong!) by archiving a copy of a Web page that you use as a reference, exactly as that page appeared when you linked to it.
Imagine if someone were to write a script to go through Wikipedia and WebCite all of the reference links. How fabulous would that be?
(I came across this in a TPM post about Donald Trump telling Fox & Friends that he is totally not at all a racist, because he had that one black apprentice that one time.)