F*%& the Warranty – explorations in hacking, modding and making

Make Magazine – Proud to be a charter subscriber
Adafruit Industries – Unique and fun DIY Electronics and Kits
Green Power Science – Originally got here to explore solar, but this guy has some awesome projects
Instructables – The grand-daddy of all how to sites.
DIY Film Gear – A lot of my tinkering comes from solving particular filmmaking or photography challenges on the cheap