Just for an FYI on the AutoCAD PDF size.
I ran a test last night using ADT 07 and Adobe 8.0 Pro
The Adobe PDF from inside ADT was 77,890
The ADT PDF from inside ADT that was scaled to fit was 510,991
The ADT PDF from inside ADT that was scaled at 1:1 was 491,680 and cut off the margins.
EDIT: the DWG file size is 170,080.