The CLEAR Spot is made by Sierra Wireless, and is essentially, an AirCard W801 (http://www.sierrawireless.com/productsandservices/AirCard/MobileHotspots/AirCardW801.aspx). It does not do N, only B/G.

CLEAR aims to provide 3-6Mbps on the downlink and throttles uplinks to 1Mbps. There are service areas close to towers where it is not unheard of to get 10-12Mbps (I was in an area today where we had 8.95Mbps down, consistently, and about 0.95Mbps up). The network here is still being built, so service is spotty, but where it works, it really does, well, work. :-)