Google acquires Jaiku, a Finnish start-up which created a presence-blogging service platform made by the integration of the web with mobile phones (called microblogging). (click here for Jaiku web site)
A similar service is twitter, popular in USA.
Interesting to see how Jaiku will evolve with Google, overall the idea is good. Actually, the context watcher application, developed during the MobiLife project, had similar features and more advanced ones. But that was a prototype application with research on context awareness in mind, while these are products.