I find this sort of information *from servers* to be extremely
useful.
In addition, one thing I've been cogitating on is how to express
copyright restrictions/licensing terms/payment agent information in a
way that a user's automated browser can read *before* fetching the
entire document (i.e. using a HEAD request). Making copyright
comprehensible to a *program* (especially in my self-imposed limit of
400 bytes, max) is a bit of a challenge. (But I have some ideas which
I will post later this month after they I get a chance to bounce them
off some lawyers better educated in this area than I am.)
--karl--