So here's a question. With Wordpress MU installed, are there any plugins that will allow you to search across multiple blogs.
For example, if I have two blogs, one called personal, and one called business, can a user type a query in the search field of one blog, and be returned results from a combination of both blogs?
I looked at phpDig as an option to providing this, but I'm wondering if there is something already written to this effect.