travis@john-galt ~
$ ssh trthomps@yakko.cs.wmich.edu
Local proxy sshproxy.butters.co resolves to 141.218.143.78
Connected to sshproxy.butters.co:80 (local proxy)

Tunneling to localhost:22 (destination)
Communication with local proxy:
 -> CONNECT localhost:22 HTTP/1.0
 -> Proxy-Connection: Keep-Alive
 -> User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Win32)\n
 <- HTTP/1.1 500 Internal Server Error
HTTP return code: 500 Internal Server Error
 <- Date: Fri, 20 May 2011 17:11:12 GMT
 <- Content-Length: 538
 <- Connection: close
 <- Content-Type: text/html; charset=iso-8859-1
ssh_exchange_identification: Connection closed by remote host

travis@john-galt ~
$ cat .ssh/config
Host yakko.cs.wmich.edu
        DynamicForward 1080
        ProxyCommand proxytunnel -v -p sshproxy.butters.co:80 -d localhost:22 -H "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Win32)\n"
        ServerAliveInterval 30

travis@john-galt ~
$