Hamachi is genius. Install a simple client on Windows or Mac and you have a VPN that is transparent.
As an example, I can now browse my Mac mini hard drive at work through a normal explorer window. Other uses? Well why not do VNC over the Hamachi network instead of over the internet. That means that I don’t have to open my VNC ports on the my router, reducing risk.
It appears to be secure, but is definitely for confident geeks, not man in the street.
Initial thought is that the quality is terrible streaming through iTunes, but it does work. Maybe some other apps would be better?
I started investigating all this here.
[NB the post used to have Hamchi as the title. Random misspelling meant I got some traffic. Now corrected]