WordPress.com continues to serve up some awesome additions to their service. If you have not seen the changes to the Tags pages then please do check them out and the explanation which is here.
The related tags are serving up very interesting pieces and the whole section just feels easier to navigate. I have been consistently impressed by WordPress and now they have stepped up to the plate again.
I wish they were Book Publishers sometimes, with this level of innovation I doubt publishers would have to worry about Google Book Search or digitisation at all.