That Google deployment map is questionable. Just a quick review of some of the locations quickly resulted in a lot of them being in wrong spots or incorrect. Makes me question validity of other locations.
Either way, WiMax has a very strong potential in world wide deployment. There are tons of places out there where wired networks are very poor and WiMax could totally save governments of those countries tons of money in deploying WiMax based networks.
Sure, I can get WiMAX tomorrow from Towerstream (backup T1, $300 a month), Triton Data Link (check out their website »www.tritondatalink.com/ ), or Next Phase Wireless (their only webpresence is a blog not updated for almost 2 years »nextphasewireless.blogspot.com/ ) or the FAA, or the Department Of Defense