It contains handy options for creating a VPN and configuring settings.
However, it hasn't been updated for a considerable amount of time.
You can also apply a proxy configuration for establishing the Internet connection.
14/Jun/08: This version has now been superseded by 2.8.7c.
Released a new version for Linux/Unix today: 2.8.4, which has similar features (ability to move the tree and userlist) to the Windows release a few weeks ago (see youtube video below).
We're constantly experimenting with new services and apps, one of which is an invite-only group messaging app called Yahoo Squirrel (currently in beta).
VPN-X Client is a Windows application that you can use to set up a virtual private network and forward ports on the client side.