I've used Delicious Library 2 for Mac OS X with my mini's 1.3MP webcam and I've managed to learn the sweet spot for that program to scan my items. I tried the same positioning on the website with no luck. One thing I did notice, the display for Delicious Library showed a negative of the image vs the website which showed things oriented normally.
Mini1: Vostro A90, Black, 2G, 1.3 Webcam, Bluetooth, 64G SuperTalent, OS X 10.6.4
Mini2: Mini9, Black, 2G, 0.3 Webcam, Bluetooth, 32G RunCore, OS X/Win 7, internal PCI-e SHDC Reader
Mini3: Mini10v. Black, 2G, Webcam, 640G HD, OS X 10.5.8/Win 7/Ubuntu [Hibernate w/NBI 0.8.3 RC4] Dropbox Referral