Subversion Online Book

I’ve been using Subversion in a very simplistic fashion, but am gradually learning more about it.  Folks who have used Subversion a long time are likely aware of the great Version Control with Subversion book available online.  It’s pretty neat that O’Reilly allowed the content of this book to get put freely out on the web, so consider plunking down money for a copy of the book if you find it useful.