high speed wireless over 3 miles..

[Technomage]

ok, I have a few questions.

I would like to create a high speed link device for a friend of mine. he lives 
far enough away that putting in cable or DSL is not practical and the only 
alternative is to somehow get an 802.11x signal to reach from his place to 
the node where I have setup internet.

any suggestions?

I am looking for DIY/cheap solutions here.