Remote Desktop over a SSH tunnel client

From an email:

WiSSH is a new client that allows you to access Remote Desktop servers (running on Windows XP Pro) over a SSH tunnel.. Due to the way that Remote Desktop was architected in Windows XP, the standard tunneling procedure won’t work when you try to use Remote Desktop over a SSH tunnel. Windows 2000 and Windows 2003 Server do not exhibit this problem.

WiSSH allows access through the Gateway SSH server to Windows 2000 Terminal Servers, Windows 2003 Terminal Servers, Windows NT Terminal Server Edition, Windows XP with Remote Desktop enabled, and Windows 20002003 Servers with Remote Administration enabled.

Go here for the WiSSH website.