As it stands, the green "dots" that you see in the picture above represents Sprint's 4G footprint in the United States.  In other words, it's not that huge (27 cities, to be exact).  What's even more interesting is the rollout itself - note that there's no 4G markets in New York or California.  Though other cities have been rumored for a 2010 rollout, Sprint today announced that WiMAX would be coming to Boston, Denver, Kansas City, Houston, Minneapolis, New York, San Francisco and Washington, D.C. by the end of the year. 

For those in the aforementioned areas, you'll be able to tote around an Overdrive WiMAX hotspot soon enough.  Anyone going to beat down the doors for one when 4G launches in your market?

Via MobileCrunch