Today sees the second pre-release of Aranha — “The Siberian Hunting Spider”.
Aranha is a FastCGI responder based on the Lua programming language and is under heavy development. The language has been extended and various other joyful changes have occurred since the previous release in June.
The HISTORY file details the major changes.
I encourage you to get a copy and have a good play. You can find a tarball to download here so the only excuse is not knowing how to configure your webserver to have a fastcgi responder. Also if you like Bazaar-NG and want to have a play with the history of aranha, you can get a devtree by following the instructions on the aranha software page linked above.