There are free systems that do this such as - http://freenetproject.org/ http://freenetproject.org/ http://oceanstore.cs.berkeley.edu/info/overview.html http:

There are free systems that do this such as - http://freenetproject.org/ http://freenetproject.org/ http://oceanstore.cs.berkeley.edu/info/overview.html http://oceanstore.cs.berkeley.edu/info/overview.html