Use Trick.ly To Share Secrets With (Some) People On The Web
Say you want to share something with a large group of people on the web, but not everybody? Well, you can use Trick.ly, which is a url shortener, but with a catch: it only takes people to the destination if you know the answer to a question. So if I want to put up a page of photographs of Mini, complete with pictures of his face, his name, and his full name, I’ll go to Trick.ly and only allow the page to be viewed by people who can say what the other half of his nickname is.
Kind of cool.
(Via Seth Godin.)