I wonder if a <link rel="next" ...> or a microformat including a decorated <a> tag would do the trick for that?

I'm thinking 'next' rather than 'next-page' because it seems to me that "next blog post" and "next page of results" would both benefit from basically the same thing, considering a paginated resultset to be a collection of collections of size $page_size.

Seems like the sort of thing a browser extension could easily pick up on and do something useful with.