"Lifestreaming" is a buzzword which basically means you can share everything from the incredibly personal to the distressingly mundane with everyone who gives a crap, anytime/anywhere.
In that vein, Google has acquired Jaiku - a Finnish "life streaming" tool compared frequently to Pownce and Twitter. A differentiateor between Jaiku and Twitter is the ability to coordinate and "lifestream" activities across multiple properties, e.g., you update a profile, upload a pic to flickr, etc., and since each thing is date and time-stamped, it can be featured chronologically in your Jaiku feed.
According to Mashable:
"the move marks yet another development in Google’s mobile ambitions. Earlier this week, reports of the company’s entry into the mobile operating system market went mainstream, while they also recently acquired mobile social network Zingku."