Aha, cool, so you're not actually using the 7805 that's shown on the schematic or in the photos. I didn't know you were using something different.
All those projects should be active to some extent, although some aren't showing much activity because they've been around for a while and are beyond the early rapid-iteration stage. Some of the projects are several years old.
I can't speak specifically for any of the others, but the last link (the "vehicle telemetry system") is still being actively developed. I've added more to it since the book was published, such as the ability to write KML files directly to the memory stick: that's really cool because you can go for a drive, pull out the memory stick, plug it into a laptop, and open the trip file in Google Earth to do a 3D fly-through. The next thing I'm planning to do is get it to manage its own Internet connection without requiring me to have the Alix-1 running in the car and sharing its 3G modem.