Ok i've decided to try and make this. I need Yagi it seems, so a cantenna it is! Parabolics are too much of a pain in the ass to get right so I'll go for a can.
http://www.turnpoint.net/wireless/cantennahowto.html
Where is the best place to find electronics parts and pieces as well as stuff relevant to wifi (like SMA pigtails or N-type connectors)