Yes direct from Rockminer. They're sold in minimums of 10 via Rockminer, but there are plenty of resellers about - even on Amazon.

these are quiet I had three.  three run with less noise then 1 s-3 by far.

Thanks for Dogie's awesome review 

People were having so many problems using bfgminer on the original that I had to stop recommending it in this case. I'm not sure if it was continual user error or what, but you can have a look through the old thread.

I'm not shure if I'm right here but I got my box today and I have 33% HW errors.
Is my device defective?

That screen shot appears to have only run less than 1 hour. These new R-Box need about full 2 hrs. for the stats to stabilize. I also see people are using the 270mhz freq. but Rockxie has already stated in the official thread that the default should be 320Mhz freq. to achieve expected hashrate.

Yes-ish
No

Not in this version fork otherwise my perfectly good unit would have a 10% HW rate. Dividing by my difficulty (64) gives a much more reasonable value of 0.14%

If CGWatcher is assuming that its diff * accepted and its not, then you'll get the fake high HW rate.