Normally earthquakes are detected with sensative instruments, under the care of trained seismologists. With the Twitter API (our Twitter API profile), the ability to detect and report quake locations may fall into anyone's hands.
California-based Zurb is turning the dry science of usability on its head by using Twitter and Facebook APIs to socialize user testing. User testing has long been the domain of usability experts who utilize carefully controlled focus groups, panels and one-on-one interviews to assess software and websites. Zurb’s suite of socially connected testing products let anyone quickly and easily create a test and gather insights from Twitter followers and Facebook friends.
As more and more people are using Twitter as a means of sharing and communicating, it seems that almost every web and mobile application on the planet as a "Share this on Twitter" feature. Most of the time, this feature is welcome. Posting Foursquare mayorships, new blog posts, entertaining YouTube video, etc. But sometimes, it's a problem. Namely, when a web application doesn't include the option to not post to Twitter or makes the button hard to find or easy to miss.