Amateur Cataloguer's Rule!

It had to happen - Shelfari works on a similar concept to LibraryThing. It's free, but my initial impression is that it doesn't have all the bells and whistles that LibraryThing has. For example, when you do a book search, where are you actually searching? The only display option is with covers, and tagging isn't as quick. Or perhaps I'm just a die hard LibraryThing addict.

My question - when is someone going to create one online catalogues for DVD's and CD's? (If anyone knows of one - please leave me a comment!)