I just wanted to stop and thank everyone that posted links for me. I've checked them out and there really aren't any diamonds out there right now. There were a FEW that were interesting (in the right ballpark):
http://www.baber.com/barebone-computers ... w-blue.htm
You'd want to chuck the MB right away and use the iMac looking case and lacking dimensions, that's a $99 gamble I'll skip.
This one is still dark in color (not fun) but has some bizarre styling:
The dimensions of 11.75" x 10.75" translate to 298x273mm which should fit whatever I'm looking at throwing in there.
The most desirable solutions still seem to come from http://www.soldam.com
with their Polo T 2 and the Pandora Plus 2. They're selling them again (as of the 23rd)!
(whipping out my yen conversion calculator)
so... an empty Pandoar Plus 2 or Polo T 2 case is ~44,800 yen (/133.3) = $336 and add 16,000 yen (/133.3) = $120 for shipping and... OWWWW!
The Shuttle SV25 can be had for $250 from mwave.com. The Windwalker SS40 and SS50 look good, but I can't find them anywhere.
And to boot, the Shuttle and Soldam products are wrapped tight to the MB dimensions; using it for other MBs in the future looks dicey.
*sigh* not... a... perfect... world.
Thanks again for everyone's help. This is quite the adventure.