A big +1 on the slow iPhone app startup time - particularly if you're connected to some wifi network other than the Nomad's home network. I timed app startup at 3 minutes 50 sec, when all I wanted to do was launch and watch a video I already had on the device! Turn wifi off (unacceptable workaround) and startup is reduced to eight seconds.
Other than that, it has been a pretty painless Out of the Box Experience, though, which is refreshing. (I had no apostrophes to screw it up.)
So it's looking for the original network maybe while you're on some other network. And taking a good long while to time out internally perhaps. That seems like an easy thing to fix in a future rev: "Stop looking for Nomad/home net when Wifi network ID != Home network ID". (It would cache the ID the first time when you are loading content.)