I meant to have this one finished something like 2 weeks ago, but it kept getting more complex than I expected. Well, that’s why Views is in development and not a finished product, since it points me at weaknesses in the system that module developers may notice.

In any case the Views Bookmark project exists to illustrate some advanced functionality available to module developers who wish to use Views functionality to enhance their own modules. Also it is a useful module in its own right.