Amtrak Upgrading W-iFi Service on Its Trains, Acela Trains Already Enjoying Speed Boost
"We continue to place a strong focus on improving customer satisfaction, and this upgrade is delivering the improved speeds and connectivity required to maintain a competitive edge," said Deborah Stone-Wulf, Amtrak Chief, Sales Distribution and Customer Service.

Image Source: Flickr (Gene Bowker)
In start contrast to how airlines handle Wi-Fi service, Amtrak is providing the amenity free to passengers, though there's a caveat. To prevent a few data hogs from ruining the experience for everyone, Amtrack restricts data-heavy activities that can slow everyone else down, such as streaming video and music, and downloading files larger than 10MB.
That's a bit of a bummer on longer rides, as it means you can't fire up Netflix or listen to Spotify (or Google's new All Access music service). However, passengers should be able to surf most websites and participate in social media, such as Facebook, Twitter, and Google+ to pass the time.