I ran into this online circuit design program, called CircuitLab, on a few blogs and forums, and have been playing around with it myself. There are many who are more technically-minded than myself (Fred W0FMS comes to mind), but I’ve had some initial luck playing around with it. It’s very visual and easy to use (on Firefox, at least). I’m curious if others have tried it and what your reactions are? I know that this isn’t the first circuit simulation program out there, but it seems ridiculously easy to use.