Well, I guess I'm the first to get mine....advantage of being in Canada and working from home, I guess. Here's the unboxing. Build quality feels solid, lots of rubber on the bottom to keep it from sliding around. Layout will take a bit of time to get used to, especially for the left hand.
I haven't spent much time actually using it--plugged it into my linux machine and it basically worked as expected.
The only thing I'm not totally sold on is the angle of the enter key. I suspect they're intending it to be pushed with either index finger, but I think it would be better to have it sloped like the spacebars. Only time will tell, and maybe they'll offer that as an option if it catches on.
1) I've uploaded a picture with a hand on the home row as requested. For reference, I normally wear XL gloves. Also added a picture with the capslock/numlock turned on. It's hard to do it justice in a photo but it's a nicely subdued blue glow that shines through the black keycaps. I like it.
2) I should point out that I ordered the 109-key version for flexibility but asked them to swap the 105th-key equivalent (above the tab) for a "Del" key like on the 104-key version.
3) As Gerk points out below, the enter/backspace are swapped from what they show on the website. If using the index fingers I suspect the version on the website (with backspace between the spacebars) would be better. I have a feeling I may end up swapping the shift and ctrl keys on both sides and then making the right "ctrl" key a duplicate "enter" key. As far as I can tell the shift/ctrl keys are the same angle which should make this a trivial change.
4) For xsar, one of the dip switches maps the left spacebar to "alternate". This should allow arbitrary remapping of left/right spacebars.
5) No user manual or drivers was shipped with the keyboard, which is unfortunate. I assume they'll be putting it up on their website.
It's definitely going to take some getting used to the layout of the keys that have been moved, but I think the curved horizontal rows will turn out to be a really good idea.