The Amiko Alien is a similar box but I am waiting for the updated version to come out for comparison before I buy one of these new media style boxes.
The Alien sounds like an AZbox without the software bugs -- except it doesn't have blind scan or 4:2:2. The next version is supposed to have blind scan, but it would be best to wait til it's been tested thoroughly before you buy it.
The Optiboxes do have blind scan, but they don't have quite the software flexibility as the AZbox -- unless you load Enigma on them, BUT, I haven't seen any thorough reviews of their Enigma implementation yet. So once again, I'm awaiting further information before I buy.
The reason I'm considering something more expensive than the forthcoming MicroHD is because besides the clunky Openbox, I've got a slightly clunky media player I'd like to replace as well, and why not replace two boxes with one?
As to the whole certification issue, that's meaningless to me. I've got FCC-certified devices that constantly spew crap that I can pick up on my modest HF and VHF monitoring equipment. It may not be strong enough to affect other people, but for my money, it ought to be shielded enough to not effect me either, yet it isn't. And UL? Just because it isn't certified doesn't mean it's inherently unsafe, that's a logical fallacy -- and as someone who believes that a free people ought to be governed only by rational laws, I would take that argument to court in the extremely unlikely case that the need ever arose.