I am considering different blogs for each project I'm involved in. I got the idea of separate blogs for separate projects from reading Kevin Kelly.
Digital Video Secrets (stuff related to the book and digital video in general). Good place to put Digital Video Secrets extras.
Producing With Passion (stuff related to the book)
Yoga (all things yoga, including photographs, notes on postures, notes on teaching techniques)
Digital photography (Nikon D40 stuff, maybe Nikon D90 stuff)
Writing (notes about writing nonfiction including research, note taking, structure, contracts, legal stuff, marketing, ethics. Also general writing stuff about interviewing techniques, work schedule, repetitive stress injuries, speech recognition tools, online transcription services)