I'm following more or less all the current buzz about changing the site name. I entirely agree with the proposal.
However, I haven't seen mentioned (maybe it was, but, well, there are a lot of answers and comments) anything about one particular technical aspect involved in the change of the site name: hyperlinks.
Imagine I have a link in my blog, pointing to a very popular, highly upvoted question with an excellent answer. What would happen after the site is renamed and—I imagine—moved to a different third-level domain name?
Would it be automatically redirected to the corresponding question on the new site?
Would it show a page telling that the website moved, inviting the user to figure out by herself how to find the new question?
Or would it simply result in a generic HTTP 404?
In my opinion, only the first solution is a valid approach. Anything else would be disastrous both for the overall internet community (there are enough dead links already on the internet), and specifically for the newly renamed website: an important number of new users come here from Google, and it would take some time for Google to reindex all the content on the new site.