In the "Deploying into OSGi" book, Fintan added two new chapters, "Building a FAB" and "Deploying a FAB", which are relevant to FABs. He also did some refactoring of the rest of the book to take FABs into account. Can you take a look at the two FAB chapters and let him know what you think? Of course, there will be some more things to document after you have your final tweaks to the FAB functionality.