So, mine showed up this morning. I let it update while I ran out, came back and tried out the gaming side for a bit. Some observations:
- Amazon was nice enough not only to link my account to it in advance, they also pre-synced the controller. Having bought Kindles in the past, I expected the former, but not the latter. Nice touch!
- The controller is pretty decent. Feels more or less like a 360 controller to me. The digital pad is a little stiffer than I like, but better than the 360 one (which I hate)
- There are only about a dozen controller enabled games in the store at this point.
- There's a 'developer options' menu in the settings menu. All it lets you do is enable ADB, so sideloading might be possible.
I tried three games - Sev Zero, Grow (I think it is), and Sonic CD, which I got for free yesterday.
Sev Zero is a hybrid of a tower defense and third person shooter game. You place down towers to fight waves of aliens, but you also have to beam down yourself to help take everything out. Beating aliens generates money which you can use to place and/or upgrade your towers (all typical tower defense stuff). Graphics are nothing special (good for mobile, probably somewhere between PS2 and PS3 quality, but at least at 720p), but the frame rate was consistently solid.
Sonic CD is pretty much as advertised. Nice performance, and much more fun with the controller versus a touch screen.
The other game is pretty much a standard 'eat smaller stuff, get bigger, avoid getting eaten by bigger stuff' game. Definitely a mobile port, but nice enough looking and easy to figure out.
Overall, the interface is very snappy, the games all run at solid frame rates and there's no noticeable lag, and performance navigating around the system blows my old Roku out of the water. However, I haven't tried any of the non-gaming stuff yet. That's next.
EDIT: The controller is now back-ordered until April 24. Sucks if you wanted one to go along with the unit. They still should have considered a bundle...