Airspan just posted in their website a brochure and graphics of a WiMAX USB device, the MiMAX USB: http://www.airspan.com/products_wimax_custprem_mimax.aspx
Can’t write too much about it as I happen to be the Software Manager of this product.
disclaimer: This is a personal blog. The opinions expressed here represent my own and not those of my employer. (I am working for a WiMAX equipment vendor).