They make the point, and I quote here 'Blogs are displayed in completely random order!' - this in the Blogs in Richmond section. I think this is fine if you have a small collection, but they're going to need to ramp up quite quickly to add a proper search function - which they could actually do now with a custom search engine.
Very specialised and niche at the moment. Doubtless they'll let me know when they broaden it out and they do have an option to add your own blog as well.