That plus the list of shipped apps in the sidebar is incredibly impressive. Zed should write a book on GTD.
Clearly Zed Shaw has discovered self-replication and is using it to his advantage.
For example, I try to practice guitar 4 hours a day. I also like watching TV. So, I have a little practice amp in my living room that's always plugged in and has a cable so I can just grab a guitar, and noodle while I watch TV. That alone gives me about 2 hours of practicing mindless stuff.