Using helium filled balloons launched from New Zealand, and floating about 12 miles (20 km) in the stratosphere; Google is testing Internet access via remote controlled balloons with flight computers. The balloons will control their location by changing altitude to pick up different wind patterns. The transmitter on each balloon would beam down the Internet to an area about 780 square miles (1,250 square kilometers) — twice the size of New York City; but will require a special transceiver on the ground. Connection speeds will be equivalent to 3G. Inter-balloon and ground-to-balloon communication will use ISM bands (specifically 2.4 and 5.8 GHz). You can follow their progress on g+.