Wow...I've been reading up on the features and I'm fuckin' impressed with this app's integration with Apple apps and the hardware.
Everyone knows there will be iSight scanning. Everyone knows you can also buy a Flic Wireless Laser Scanner. But the cool part is that the scanner remembers 500 barcodes and imports them into Library 3.0 when you're back in range if you happened to be out of range when scanning your belongings. That's frickin' awesome.
Dragging items from your shelf to Mail creates an e-mail with a pre-formatted message urging your friends to get said item. Neat.
The most original feature though is the checkout process. You're lending a book or DVD to someone? Drag the item onto his Address Book card (or name?) and Library 3.0 automatically marks it as lent and sets the due-date in iCal.
iPod syncing...cool. Printing...cool. Live-searching...Panther and Tiger cool.
Voice searching? Übercool!
All this plus built-in Amazon shopping and recommendations.
It's like the iTMS for the rest of your life.
This app is pretty much essential to everyone that has Mac OS X. The quality and features of this app seem to be mind-boggling. Everyone has books and music CDs. Most people have DVDs and a lot of people have computer games also.
Most people have so many of these that managing it all is almost impossible. How would you know if someone took one of your music CDs out of your 200 CD collection?
Even if you're not into managing your collection, if you're someone that likes to buy stuff off Amazon, this is the app.
If you're living with a sister that pretty much grabs your movies without your permission and you don't realize it until you look at a list of stuff you own (this is were Library 3.0 shines for me), and realize you actually own the Simpsons Season 4 DVDs but they're not physically in your bookshelf, you can go slap your sister real hard and take those DVDs back. This alone will be worth whatever Delicious Monster charges for this app. I'll finally know what movies my sister is sneaking into her room and forgetting to tell me.
If I can make only one suggestion, I'd say release the app now and save some features for version 2.0.
Afterall, it's been a month.