Michael Beall wrote me in response to my unofficial Tool Palette themed posts this week on the blog and provided more resources for AutoCAD Tool Palettes.
Lee ( AutoCAD Master and Black Belt) Ambrosius has a Tool Palettes eBook available at http://www.hyperpics.com/eBooks/. Lee also has a blog Beyond the UI http://hyperpics.blogs.com/beyond_the_ui/ which mentioned yesterday that new AutoCAD books from, several great authors are coming out.
AutoCAD Books Coming Soon to a Store (or Web Site) Near You.
In browsing Michael Beall's own site Michael's Corner, it shows he is an advocate of Tool Palettes and stated "the best thing since Layout tabs"; He has touched on Tool Palettes a total of 13 months in the archives of his monthly emailed (needs a RSS feed) AutoCAD tips and tutorials. http://www.cadtutor.net/corner/archive.php