PowerBridge M5 3×3
Here is one really good looking diy project.
One very good build diy box for outside wifi use with plans so you can build it too.
Very good ventilation and drainage, heating and leds for knowing what is going on in.
link is here : http://make-a-project.blogspot.com/2011/10/diy-outdoor-all-weather-3gwi-fi-router.html
you can find plans building one.