@Robbie - There used to be a website a long time ago that served the purpose of being an online demo site that ran the bleeding edge version of WordPress but I can't find it. The opensourceCMS website is only running WordPress 3.4.2 which is an old version.

@William Beem - There will be a post mortem. If there isn't, plenty of people will be voicing their anger in the comments on the Make.core WordPress site. A post mortem would serve as a learning exercise so the team doesn't repeat this behavior in the future.

@Shapeshifter 3 - I have not seen or heard anything on an official time line for the post formats ui plugin. I'd guess it will be released either in tandem with or shortly after 3.6 ships. However, at this point, they could decide not to do it and just completely start over from scratch on the whole concept of Post Formats UI.