Apple buys WifiSLAM for $20 million, company provides indoor positional data
within an accuracy of 2.5 meters. Apple needs to make these small acquisitions to improve its Apple Maps application. In Australia, the cops called the application life-threatening as incorrect directions between cities led some travelers to get lost for hours in the Outback. Apple continues to support its mapping application and hopes to strengthen it with acquisitions like this.
An Apple spokesman confirmed the deal with an understatement saying that "[Apple] buys smaller technology companies from time to time."
source: WSJ via AppleInsider