Sprint's already got its 4G network up and running and looks like Verizon will roll its own LTE network in November.
Verizon last year said that its LTE network would be launching in 2010. Today we have a specific date, as sources say Verizon will launch its new, 4G network on November 15. Engadget reports that Verizon will be launching its LTE network just in time for the holidays, with a push into over 30 markets around the country -- including New York, LA, Chicago, and Philadelphia -- and ten airports.
Back in March, Verizon CTO Anthony Melone told the Wall Street Journal that the network would launch its first 4G handsets between three and six months after the LTE rollout. Unfortunately, Melone also said that LTE would signal the end of unlimited data plans.
Recent reports suggest Verizon could announce new tiered data plans next Thursday.
Source: Engadget

Isn't it fun when you manipulate numbers.....
We have 4g in Moscow, and connection speeds vary from 100 kbit to 3mbit.