Maybe it's way out of scope, but it would be really great if our friends from Coding4Fun were willing to cover some basic electronics. I'm thinking of an open series (the "1 of n" variety used by STL) covering really simple things like driving higher loads, powering LEDs, using relays, basic sensors.

Complete projects are nice, and there's a cartload of precooked modules and shields out there, but trying to make your own hardware can be frustrating at first (and smelly).