Why not use WiMax? Isn't that supposed to replace Wifi?
WiMax is indeed a new wireless technology that has many benefits over traditional 802.11a/b/g/n WiFi, including transmission range and speed. However, WiMax equipment (routers, repeaters, antennae) are still prohibitively expensive as of this writing, and Wimax-capable laptops and handsets are not yet commonplace. For example, Best Buy does not sell any WiMax devices as of this writing.