davezan said:
Only to California-based users at least, based on the sex.com case.
No major court examples regarding the net are only state-wide, or even country-wide. The web is international, and the sex.com case was a huge one. (So was the wwf.com case.) But as to the other poster seeing domain holdings as a mere "service," I'd say no, it's more like actual real estate (aka cyber real estate or electronic real estate - "ereal estate"? - take your pick).
Point is that if you think about it, the web is already set up just like a real estate office - having buyers and sellers of both personal "houses" and business "buildings" (depending on how the domains are used), helpful registrars ("agents"), etc. The only thing missing is that you never have to mow the lawn!
Regarding domain-owning people passing on, as soon as they find out they're in deep physical trouble, right away they should transfer their domain properties (forget trying to shoehorn it into a will) to whichever relative (or even friend) whom they want to see owning their favorite "web homes."
Of course, in the rare case of suddenly getting hit by a truck (or a major coronary), even then the family (which hopefully is aware that the guy owned domains) can still step in and notify the registrar about what they want done with them.