Micro-blogging is a form of blogging that allows users to write brief text updates (usually less than 200 characters) and publish them, either to be viewed by anyone or by a restricted group which can be chosen by the user. These messages can be submitted by a variety of means, including text messaging, instant messaging, email, MP3 or the web.

Known online services that handle micro blogging are Twitter, Jaiku & Pownce. Just recently, Google purchased Jaiku and it is now part of its long line of services.
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