I had an idea to start working on a web-based interface that communicated directly to objects in-world using only AJAX. AJAX would be preferred, as the processing would be done within a clients web-browser rather than the server, and it opens up the ability to host everything on a static web site. I found staticloud was a great site that is free just for this purpose. It turned out that http_request receives the request, but the web browser ignores the response. I tracked it down to a missing header on Linden Lab’s end. I filed a feature request (SVC-7038) and ask that you vote on it.