One really good thing is that since Ouya has the stock browser (though you can install Chrome or any other browser too), it has full Flash support, so colbertnation.com and the dailyshow.com both show full episodes (even though they're already on the DVR, of course). Installed Crackle just now, works just fine. Not much content, but Comedians in Cars Getting Coffee is pretty funny.
One potential downside that I never mentioned is that you can't turn on the console with the controller. Having said that, the system only draws 4.5W max, so there's really no reason to ever turn it off. It will turn on if you switch to the input you have it connected to, so I guess technically it's no big deal.
Edit - I take it back, you can turn on the Ouya with the controller - just not from a cold boot (as in power supply was unplugged and plugged back in).