Today, Apple posted guidelines for the App Store review process (requires developer login). This is a huge step in the right direction. The document still contains a lot of wiggle room and vague conditions and doesn't change the fact that Apple still has total discretion and can reject your app for new, currently unstated reasons if they want to, but it is definitely good guidance for App Store developers and should reduce the number of rejections for unknown reasons. If you develop for the App Store, you should read this end-to-end. Now.
Apple also issued a press release today that states that Apple is setting up a review process for rejected apps and also says that Apple is loosening the restrictions contained in several clauses of the Developer Program License (3.31, 3.3.2, and 3.3.9). I'm hoping that these changes will allow Briefs.app on the App Store, but I haven't heard anything yet from Rob to indicate that the review status has changed.
Fingers crossed for Rob and Briefs.app and kudos to Apple for listening and making changes.