3 recommendations
DVDpedia (It has lots of features, quicklook function pretty cool)
Delicious Library (It's pretty. Organize books, DVDs, and music CDs)
Boxee (My choice for organizing and viewing DVD rips)
I convert all my DVD's to MP4 and just store them on my hard drive. I hate having DVD lying around and having to find them. I just have boxee look up my DVD rips. Boxee pulls in meta data such as DVD album art, movie review, movie info, and even movie subtitles.