Not yet. I have been hearing about this from several reliable sources.
I like the 1 space size, but I see what you mean about heat issues and possible fan noise. We'll see.
It's headed in the right direction, though. You can upgrade the ram and drives to get pretty beefy specs.
Maybe one day someone will knock it off for $300 street price and it will fit in my gigbag pocket.
(you know that's probably coming up the road soon...)