You can find a copy of it here:
http://download.tangent.org/myhttp_engine-0.3.tar.gz
The announcement here:
http://tangent.org/index.pl?node_id=528
I have also released mod_methods, which implements PUT, GET, HEAD, and DELETE for Apache 2.X. This allows the creation of a simple Webdav like environment to manipulate Apache 2.X webservers.
You can find a copy of it here:
http://download.tangent.org/mod_methods-0.2.tar.gz
And the announcement here:
http://tangent.org/index.pl?node_id=531