Icomera has signed SJ for 85 trains with 3G/Wi-Fi access: SJ is an enormous rail company covering parts of Scandinavia, including Denmark, Sweden, and Norway, with links out of country as well. Their Intercity and Commuter lines comprise 85 trains and they'll all have service by summer. This is the first widespread train rollout in the world, with trials or single lines connected via 3G or satellite uplink distributed via Wi-Fi onboard. SJ carries 70,000 people a year, but that must be actual people, not trips--that's the first transportation company I've seen that's underplayed its numbers.
Update: Fortunately, the 70,000 figure is a translation error of some kind. A few folks of the Scandinavian variety wrote in to point out that the company carries 70,000 passengers a day. That's more like it. I was picturing quite empty trains.