Hah, I'd no idea about this revolution, I'll also have to take a look! While rowing's tedious, I find it much less so than eg treadmill, and calories per hour makes it pretty efficient.
Funnily enough though, concept2 have just released an entirely new machine, the BikeErg, which as the name implies, is a mix of bike and rowing machine.
Only downside of rowing is that there are a ridiculous number of ways to do it wrong and seriously ruin parts of your body. Nowadays you can do well with YouTube and a mirror / reflective window or iPhone-with-advance-permission in the gym.
