What about a Fundamentals Friday on thermisters: some rules of thumb for when should you use them to limit inrush, how to pick the right one for a particular application, etc.? For example, when I've modeled circuits in LTSpice (yes I know there are a lot of idealizations inherent) if you zoom in on the first ms or two you can see some very high amperage drawn into the circuit. If that's anything like how the circuit operates in the real world, it would seem that one is over-drawing past many components' specs if only for a very short period of time - in which case, why don't we use them on virtually everything? Or is the effect simply negligible?