Microblogs

Blogs dealing with very specialised discussion.
Found on http://www.journalism.co.uk/terms-definitions-dictionary-terminology-words/

Microblogs

online short form communication services that facilitate the public exchange of text, video and image links. Popular microblogs include Plurk, Twitter, Tumblr, Posterous, identi.ca, Yammer, and Jaiku. China tends to have its own popular microblogging sites that include Sina Weibo and Tencent Wiebo.
Found on http://amecorg.com/2012/06/glossary_plain_speaking/
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