Arvind at Movalog, along with some assistance created a nice alternate version of the Livesearch functionality that integrates with Movable Type and still allows the traditional CGI-style search function to work. While I haven’t had much time to investigate this in depth, it doesn’t strike me as quite the same thing as I’ve implemented and described, but is instead closer to the Google Suggest functionality or something in between.
Nevertheless, it’s very interesting and I’m going to look at how these two options might be combined to overcome the shortcomings I outlined in the earlier post. I’d really like to see the original search functionality remain available as a fall-back alternative for users in unsupported browsers or with Javascript disabled.