We just put up the release page for eScape - our honest attempt to make creating ePubs easier for the enthusiasts out there. Note that it is only licensed for non-commercial use.
The main post for the eScape beta release is over on the XML Blog as this product is more about XML/XHTML and production than using and viewing ePub. It's a pretty interesting product, and once you have mastered the foibles of structure-Styling, it makes creating basic to medium complexity ePubs pretty straight-forward.
Please post any comments about eScape on the XML Blog.