Posting short thoughts and ideas to a personal blog, particularly by using instant messaging software or a cell phone.
Twitter, which was created by a 10-person start-up in San Francisco called Obvious, is a heady mixture of messaging; social networking of the sort associated with Web sites like MySpace; the terse, jittery personal revelations of 'microblogging' found on services like Jaiku; and something called 'presence,' shorthand for the idea that people should enjoy an 'always on' virtual omnipresence.
—Jason Pontin, "From Many Tweets, One Loud Voice on the Internet," The New York Times, April 22, 2007
Fotolog, a fast-growing social networking website, has become the latest target of larger internet media players, according to people close to the company. ...
Users can exchange thoughts and feedback around uploaded photos, and a deal with AOL this month added chat, instant messaging and video messaging. It has more than 8m account holders and a broad global reach. It is adding nearly 1m members a month. Fotolog sees itself as part of a new micro-blogging trend where users are opting for simpler and shorter inputs into their own personal home pages.
—Chris Nuttall, "Fotolog in the picture as bid target," Financial Times, May 21, 2007
Only micro-blogging today. It's Sports Day. Oh, can I make a date with you all for about this time in the year 2012? By that time my offspring will be, I trust, all grown up, loaded with achievements and equipped with stratospheric levels of self-esteem. I will then feel free to tell some very funny stories about the egg and spoon race back in 2002.
—Natalie Solent, archive, Natalie Solent (blog), July 17, 2002
Here's an even earlier citation, although one that uses microblogging in a different sense (blogging personal throughts and feelings, of any length):
The blogs I like to read are the personal, those individual portraits of the human heart, blogs about lives and losses, realizations, aspirations, fears; bloggers who open their closets, skeletons and all.
—Jeneane Sessum, "Microblogging," Allied, April 12, 2002