Llius talked about a good idea to do something which is the same as ruby gems for Ruby.
It must be a kind of server to centralize all mono libraries. It will allow user to easily find a lib or a needed class/process/tool to follow the framework idea of not reinvent the weel and use what is ever done!
This will use Mono.Addins and will support binary package with or without GAC install and source package.
The front end can be an IDE as Monodevelop or VS2005, a console line tool, a GUI, or library use in any project you want.
This idea is really great and will help mono community to share work of community.