I didn't include any of the upload/plotting sites like yours, nodedb, wigle.net, and others. Partly because I am a purist that prefers to gather and plot the data myself. Partly because it's a DIY book and the chapter was devoted to showing people how to make their own maps. And partly because of the unknown privacy implications of gathering and sharing this type of data in raw form. In any case, your site is a useful tool among others and should not be overlooked when that topic is being discussed.
btw, I support what you are doing. The SOCALWUG access point was one of your early data points: June 2002!