I'm thinking it's fairly late in the design process. But here's a large pic of the logic board:

http://www.applefool.com/applefool/Blackbird_Prototype_files/Media/DSC06924/DSC06924.jpg

There appears to be a dearth of resistors under the floppy area and the chips are different than the production design.You can eagle eye the rest of the pics and tell me if you find anything I like the power button with the standard circle line instead of the ADB-standard triangle.