My development phone came in the mail so now I can finish developing the barcode scanning. I've decided to use the barcode scanner you can download from the market instead of building my own scanning UI.
The Zebra Crossing (zxing) app, called Barcode on the market, is free and I can call it from my application and have it return the scanned barcode to me when it's done. This way, I can focus on building the code to call the Amazon services.
Hopefully, I'll have the version out that looks up the title from the barcode scan no problem. I'm going to add a 'UPC' column to the movie database to lookups can be re-performed in the future in case of outages.