It's been down for a couple of weeks, but I've got my Ant Tracks script running again. Actually, I've converted the original convoluted Applescript into a server-side XML-RPC Web Service. (A very thin AppleScript client is required to get the information from iTunes and make the XML-RPC call, but most of the heavy Amazon-lifting is done in PHP on the server.)
A bonus to this approach is that I should be able to author clients for different platforms (Windows and Linux) and different players (I'd be happy if I could accomplish WinAmp.) And there's no reason that I shouldn't be able to expand the code to work with Blogger, Manila, et. al as well.
Next step is to get some fellow bloggers using the client to post to their own sites, so I can start testing the Trackback features.