What good is the domain without the code? They could rewrite the code from scratch. Though, that maks me wonder... If I single handedly write a piece of SW that does "X" and sell it to Yahoo. Can I then make a new site / app that dose "X"? Is it copyright infringement (a la the android / oracle Tim Sort) since anything I write that is an identical app is likely to have very similar, if not identical, code?
How much of what is in my head is mine and how much is covered by copyright if I've written it before?