I have Sprints current mobile broadband solution (EVDO rev-a) and the average speed is 1.5MB/400k and I can take it with me wherever I go. I went with Sprint because they treat it like broadband, unlike some others who cancel you after so much use or as the article mentions limit you to say web browsing only.
The only bad point is the latency is about 140MS to the gateway. I dropped my DSL line and just have Sprint now. I cant wait for them to roll out Wimax, which should bring higher speeds and lower latency.