All games are free with IAP to purchase full version, so integration with OUYA IAP is a must.
Also, if you're considering selling apps then you have to fill in a form W8-BEN which is a pain in the proverbial!
I've tried a few games (Fist of Awesome by one of my friends is brilliant) but I have to say, the controller is pretty ugh. I plugged in a PS3 controller and once that synced I found it better to use but the latency is still there

The WiFi is also pretty bad - I keep getting disconnected for some unknown reason.
And I have no idea why, but when I connected the OUYA to my monitor it dropped down to a very low resolution! Works great on the TV though.
Don't think I'll be able to play with it much tonight though as I have some PS Vita development work to do, but hopefully this weekend

//Andy