Salvaged stuff is great! Thanks for the earth-friendly examples, Dragonfly. I think anyone can agree that it's better for the environment to re-use something rather than throw it in a landfill, no matter what the pro's and con's of the original product might be.
I've also wondered about using those 1-5mH choke coils for some sort of filter. I would think you might be able to get it with impedance scaling, but the limiting factor might end up being the active components. Maybe not... I'd love to see a light bulb wah!
Oh, another thing you could use those choke coils for would be power supply noise filtering, especially if you're using something like a MAX1044 charge pump, the small inductors would be great for filtering out high-frequency noise.