http://www.howtoforge.com/useful-uses-of-netcat Chris Penn recently sent this to me. It's a great article on all of the many things one can do with netcat (Here is a .torrent of the netcat PowerTool books, but I haven't gotten it yet) http://www.torrentz.com/c400dacb44d5455d2c3f5031f82ba2984121afbc