WiFi! On an MBTA Commuter Rail train! Yeah, it's old news, but it's still pretty cool. I am posting this from my comfortable seat on the train from Ashland to Boston.
In my speed test on an old ThinkPad running Windows XP, I saw downloads at 199 kbit/s with 138 ms latency. On my iPhone, I saw 157 kbit/s with 0.317 seconds latency. This sample is about half as fast as the download speed I measured in my Peter Pan WiFi speed test.