The changes to the site will probably happen this weekend or early this week after all. I have been playing with redirects and the like and have modified a migration script so that permalinks will still get you to the correct page. I just need to write a theme for the new site, and verify whether my changes will keep the feeds working or not. If not, then I will need to figure something out with that.
Just an update, and an explanation for anybody that has noticed anything strange over the last couple of hours.
Well, it took an extra week to get around to it, but the site is up. I will post soon; I am just trying to get the comments RSS to work by posting one to the new site.