ratDVD claims to be a DVD movie format for online download. Author says " RatDVD is the result of my downloading experiences. Downloading movies, even DVD rips never really worked out to what I expected.
When I download movies, I want the full DVD feature set and I want to be able to watch it on any DVD player - without loosing any features of the original DVD. That is what ratDVD can do for you".
It sound like a promising new tool. AfterDown has a nice article on how to use it. A must read!