The goal of this paper: This paper was written to help people understand current wifi technology, so that YOU can make an educated 'router' upgrade decision -- because there is WAY too much hype out there (especially about wifi speeds) -- and router manufacturers' are directly to blame.

This site is a great resource if you want to understand WiFi and make informed decisions on which WiFi router to buy. It is very old school presentation, but wowsers the detail.

via Snuupy at Hacker News