Jaiku Latest in Google's Mysterious Acquisition Spree

Google continues its breakneck string of acquisitions, today adding micro-blogging service Jaiku to its roster.

Jaiku, which the search giant snapped up for an undisclosed sum, calls itself an "activity stream and presence sharing service." In layman's terms, it's blogging writ small: Jaiku users can post just a line or two of text to the Web -- usually a description of their current activity for others to see -- using Web browsers or mobile devices. The service also enables them to keep tabs on others' updates as well.