Curiosity: You, sir, are a genious.
It was the fact that everything was plugged in through the hub. I plugged the touchscreen into the other port on the Mobo, and voilla! problem solved.
The 6 volt adapter's still providing power, but clearly it's not the 4 amps it would like to have. Plugging in the 4 amp ac-dc one that was included, didn't make any difference.
'03 Escape 4WD:
-iTox mini-itx mobo, Core 2 Duo Mobile 1.66Ghz; 2GB, 80GB 2.5" HD, DS-ATX
-XM, iG4, OBD-II (BR-3)
-Rearview camera with auto-switching (modified cheesbox)
-Slim Slot DVD+RW
-RR, DFX 4