Looks amazing, and is easy to use. Good program. However, there are a few things that keep it from being a great program:
1) Don't start scanning the library upon launching the program! Either have a button for it or have a dialog pop up and ask Otherwise, after you launch, you have to wait several minutes for it to scan the whole library before you can even choose to quit.
2) Divide the library pages up. Having all 400 of my CDs on one page makes the page take FOREVER to completely load. Include an option to divide up the library pages alphabetically by first letter (A, B, C, or A-C, D-F, etc.)
3) Don't sort by the word "The"! All of my movies that start with "The" ended up in the 'T" secion.
4) Although not as necessary as the others, it would be nice to be able export just a user-created shelf, or somehow indicate which titles are currently checked out.
I think this is the start of a very promising program. Just add in a few more features and options, and this will definitely be a must-have.