Why all the fuss about Twitter?

Twitter represents one of the newly emerging personal networking and collaborative learning tools born out of Web 2.0 technologies that is quickly finding a place in both educational and social settings. Twitter, by definition, is a form of "micro-blogging" where students, teachers, and school officials send 140 (max.) character "tweets" a group of individuals who have chosen to follow their posts. For some, twittering is a way to stay in contact and/or "follow" people they find interesting. For others, it is a quick and easy ways to transmit ideas or links relating to interests they have in common. These mini-networks, which can grow to be quite large, provide a virtual space in which users share ideas, experiences, and perspectives. A learning network has value only if it includes others from whom you can learn, so choose your group members wisely.

My network includes system leaders, school and curriculum innovators, homeschooling advocates. and others whose thinking feeds my own thought process. Why do you "follow" and why?