If you have an iPhone check out the app callled SnapTell.
you take a picture of any DVD/book...
it recognizes the book/dvd etc and stores it in your scanned items. It also checks the web and gets current prices at different stores and online sites.
I dont think it would be usefull for organizing a catalog though, Just check it out it was free when I downloaded it. Cant beat free.
If you want to manualy enter all the info, the best database app for the iphone and iPad is called HanDBase.