A free weekly Newsletter with a round-up of WordPress news and articles
WordPress Multisite 101
Mika Epstein and Andrea Rennick wrote an awsome little book about Multisite. It's pay what you want (so you can get it for free) and I can't wait to read it. (I payed more then $0 and so should you ;) )
WordPress Stats and Numbers: Breaking Their Own Records
As of 2011, estimates are that 25% of all websites are published with WordPress.
