I've found some links to my content floating around the web of the form www.redmonk.net/discussion/thread.html$msgnum=2353 So I decided to route them to the same script that maps some of my other old Conversant URLs to the new site, and now the discussion-style links work after a fashion – they get 302'd to the correct url – in this case redmonk.net/archives/2003/10/30/winter-lawn-redux.