Windows, Keef.
Recommended, free, easy to use once rigged. I just have to work out what the settings are to allow my office machine to connect to it.
All home network will be operable from my "home office" computer which is my desktop, running Vista Ultimate, laptop sending out my radio stream in office running Windows XP Home (won't do remote access), laptop in lounge connected to LCD TV (running Vitsa Home Basic), new machine will be running XP Pro in spare bedroom.
Both laptops already have VNC servers on them and are accessed as required (regularly for my radio stream) from the keyboard and screen(s) used by my desktop.
It's really just to cut down on "GoToMyPC" subscription which was getting carried away. Now I can remote to my office machine from any internet connection and run my entire network (if I need to).