I'm less interested in JSF, but *am* interested in how some of the other Seam features (particularly workflow and conversations) might be used along with other frameworks--does the book go into any internals/extension points/etc?
(Plus I want a free copy :p The new JBoss/Seam combo is definitely something I'd like to add to my arsenal, and Seam appears to be about the only way I'd even consider using JSF :)
When introducing a concept that is not specific to JSF it is covered in a more conceptual matter. For example, when discussing conversations and persistence context management, we demonstrate through diagrams and discussions that apply regardless of what presentation layer you happen to be using. Once you get into the more detailed discussions you will find that the code examples are implemented using JSF, but many of the APIs remain the same regardless of your presentation layer so should be easily translated.
There are certainly discussions in the book that are specific to JSF, but that comes with the territory as one of the original goals of Seam was to resolve the issues associated with using JSF