Oh goody! Beefier versions look like they'd do as LAN boxes!
I was thinking of making a good LAN box on an ITX form factor, this seems more akin to a stripped-down laptop/desktop mashup.
Beefier versions of this have nVidia 555 GTX graphics and Core i5/i7 support from what I was able to gather in my snoop around the buy pages.
I'd still prefer to make my own setup however. That way I get a x16 PCI-E slot to play with.
External supply I could take or leave, plenty of handy 12V based ATX power options from places like mini-itx.com (not to mention a good few ARM-based devkits).
Still a good idea though for those who want small PC with some grunt off-the-shelf.