Seems like a pretty decent Maven Repository server. I've set it up to manage my own Maven repositories, including my own "external-public" repository which proxies access to a number of the big external Maven repositories.
Its easy to install and all configuration is done through the web interface. As well as configuring repositories and connect repositories so one can proxy another, it adds user management to secure access via various roles. The docs on the home site aren't great but google and you will find other good config howtos.
For more detail on functionality see http://www.devzuz.org/blogs/oching/2007/11/05/1194233400000.html