The idea of the NoFollow attribute on links was to help prevent spam from appearing on user generated content sites, particularly Wikipedia. It was intended as a way to tell Google (and eventually all major search engines) that a link was not supposed to transfer any “link juice” to the recipient of the link. In essence, it was designed to stop SEO spammers from trying to insert their links where they didn’t belong for the sake of improved rankings.
Update 2: The site is back up and back to 20-minute update intervals.
Update: Digg sped back up to its normal pace for a little while, then went down completely. API calls and everything are currently down.
For over 12 hours, the Digg front page has moved at half speed. Instead of the normal 10-minute interval between updates, stories have remained at the top of the front page for 20 minutes.
When most think of encryption, they think of computers using complex algorithms to hide data in ways that require a password or key. This is a very modern and simplistic view of a long and stories history behind encryption. Since the dawn of human communication we’ve had a need to be able to send messages without the risk of them being seen by the wrong people. Thus, encryption is as old as the written word in some cultures.
There will always be business listing errors online. People sometimes do not pay attention. Businesses move or shut down. Some businesses are asleep at the wheel and unscrupulous competitors sabotage their listings. It happens. It’s not surprising that around 20% of the listings on popular sites like CitySearch and Mapquest are inaccurate. What was surprising is that the most accurate data apparently comes from Foursquare.