Gartner puts  3.0 at the top of the list because it is likely to feature an ultra-low power option that will enable it to perform new applications, such as heart monitoring. Bluetooth 3.0 specs are due to be released this year, and Gartner projects that Bluetooth 3.0 devices will start hitting the shelves sometime in 2010.

Gartner ranks Mobile User Interfaces as the second-most important technology to watch, predicting that mobile device manufacturers will face intense market pressure to create the most user-friendly interface. The result, says Gartner, is that companies will have to adapt their business-to-employee and business-to-customer applications to keep up with a rapidly-evolving standard for mobile user interface.

Rounding out the list of mobile technologies to watch are:

--  Location-sensing technologies that can provide up-to-date information on users' locations to enhance mobile social networking applications.

--  , the Wi-Fi standard that Gartner says is "the first Wi-Fi technology to offer performance on par with 100Mbps Ethernet."