Instead of a router, I use a Dremel Moto Tool and its accessory router base. The moto tool is also excellent for inlaying and general routing, such as cleaning out the rosette groove. While I've never tried their carbide cutters, they look like they would clog in wood. Woodson Tool Co.'s Micro Miniature End Mills used with the Moto tool, however, make it a whole new tool. An electric drill is, of course, wonderfully versatile, with many attachments available including a drill press stand that might suit a guitar maker's purpose.
Some people also find belt sanders and power planes useful.
First of all, you can probably forget about gouges and do a fine job of neck carving with straight chisels followed by rasps and files. Secondly, he doesn't mention it but the only good saw I've seen for cutting fret grooves is sold by Wild. Those little triple-bladed back saws are too narrow, plus they're sharpened at the wrong angle, so they're almost impossible to move on a piece of wood. I later discovered you can get a purfling groove cleaner, which is probably what he had in mind. Many of these tools are not available from normal sources, but Woodcraft Supply Co. and Brookstone Co. mail order houses stock all of them and many more that you'll find useful.