My friend Paul tweeted about a new URL shortener like bit.ly and is.gd but with one major difference.  The domain for this shortener is only 2 letters "t-o" and they're not separated by a dot.  The link to the shortener was posted as http://to./ which appears to be an invalid link since it has no top level domain (com, net, org etc.) but low and behold, it worked.