I'm taking some time to work on the Tapestry documentation ... starting with the FAQ. It's great fun, though this could get to be quite large. I'm just spewing out content right now, over time we'll clean it up, reorganize it, and add further hyperlinks and annotations.
In fact, as I'm working on the FAQ, I'm thinking this might be the best way to document open source projects in general. User's guides and reference documents are rarely read, everyone just Google's their question, so put those questions in their most findable format. Also, it's hard to write a consistent user guide start to finish ... but more reasonable to document one tidbit at a time.
Also, I'm reminded of The Little Schemer, a book that teaches the entire Scheme language (a Lisp variant) via a series of questions of ever broadening scope.
Feel free to suggest additional FAQ topics on the Tapestry Users mailing list.