One other question - many of our articles have 3,000+ "Likes" on Facebook. I know FB likes are tied to the URL. Will all of these go away if we end up choosing to make the jump to xF? That might be a dealbreaker if there's no way to rewrite the URLs.
Edit: I just came across Brogan's thread here, which specifies there are no importers:
Is it hard to write one manually? If so, are there any resources that might help me do this?