This is great news. One of the chief issues with Wordpress that causes me to fall back on using Drupal with some clients is the user management bottleneck Wordpress currently has. I used to also have issues with Wordpress feeling limited with content types (only pages/posts) but the PODS plugin has solved that issue for me. (Man, I love messing around with the functionality of PODS now. Shortcode for pods is like my new rapid-prototyping layout tool.) And now with Justin's work, this could be the start of me offering the majority of my clients a Wordpress site.