My neighborhood Hot Spot 

Using Lynksys WRT54GL router and DD-WRT firmware

  Click images to enlarge

14dbi vertical antenna from ebay

One ten foot mast with 15 feet RG214 coax which has 3db loss at 2.4 Ghz

The large RG214 cable is connected to a short peice of much smaller RG142 coax to go through the wall.

Here is the actual router connected through a 500milliwatt amp then to the outside antenna. The amp is set for 200mw.

There are various homemade cables and adaptors to hook it all up.

Some of the router setup pages

Wireless network mode should be B-Only for best signal and range

Everything disabled here

Security is disabled

RX and TX antenna are set to right side only so it will always use the outside antenna