Proxytunnel 1.5.0 is out, and it's considered a "recommended upgrade" from the devs. This was released in August of 05, so I'm kind of surprised nobody mentioned it. "Version 1.5.0 of proxytunnel has arrived after a long, very long wait. This release includes NTLM proxy support. You can now also specify your proxy username and password using ENV variables, so they are no longer visible in process-lists. Everyone is recommended to upgrade." ~~ Andrew D.
in portage