Pin.nu is a short url service, producing URLs that are easy to remember and share,
unlike similar services that produce URLs impossible to remember.

or Follow on Twitter

Pin.nu is a private URL shortening service, and there is no plan to make it public.
This page exists for informative purposes only.
If you know the person you got a pin.nu URL from they'll
probably shorten a URL for you, otherwise I'd suggest using tr.im.