Long wireless point-to-point connection with 802.11n

Hi!

I'm new in this jkind of technology, so I question if despite 802.11n being still in the third draft, it is possible to create directional long point-to-point connections with 802.11n... I wanted to do a backbone with higher throughput than possible with 802.11g for 2 miles (3km) connections.

Since 802.11n uses MIMO smart antenna technologies and consequently two or more antennas to transmit using the multipath for transmission enhancement, the fact of using multiple directional antennas pointing to the same destiny will work?? Do you know any recommended equipment?

I thank your answer in advance

Rodrigo Selada