Veering off into territories where I am out of my depth a bit of fun in the last days of the holiday.
I’ve been playing with the new WordPress REST API using ideas from API Nirvana – Functional Details, then I remembered CogDog’s WordPress search javascript bookmarklet.
Multi WP Blog search allows you to search across a few blogs.
I doubt if this is actually a practical way to do things but it hints of ways of joining different blogs, small parts loosely joined?