A new version of the code behind http.debian.net was deployed a few days ago. It has proved to be far more stable, faster, and scalable compared to the previous mod_perl-based deployment.
There were a couple of glitches during the earlier roll-out for IPv6 users, fixed thanks to the reports by Cyril Brulebois, Michael Stapelberg and Robert Drake.
The redirector is now a plack application (with no middlewere) running under the Starman server with an apache fronted. Requests are processed faster than before and there mod_perl-induced system overload is finally gone.
The redirector is now easier to test and develop. Deploying the live instance is not yet fully streamlined, but it has seen a lot of improvement. Some important changes to the way the redirector works are already on their way to see the light and I am going to be announcing them when they do. Fork the repository and hack a few changes, contributions are welcome :)
It's probably time to move it under debian.org, and finish making it the default everywhere. It's even made its way into the installation manual.