Solution
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Twitter is a popular service that allow you to provide short-form messages and micro-blogging updates (<140 characters) via mobile and online channels.
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Pownce
Pownce provides a way to keep in touch with and share stuff with your friends with short-form messages. Send people files, links, events, and messages and then have real conversations with the recipients.
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Tumblr
"If blogs are journals, tumblelogs are scrapbooks." Tumblelogs are slightly more structured blogs that make it easier, faster, and more fun to post and share stuff you find or create.
* SocialSpark may have a business relationship with some providers
