Thanks retrolefty. I was wondering something along those lines. Sparkfun should rename that category to resonators...and they should add some 4 pin oscillators...so I can buy them... :)
The 4 pin oscillators are what I want for my external AM transmitter. Unfortunately I can't find any under 1.7Mhz. The old motherboard I have only has the 2 pin resonators that are of unknown frequency. I checked motherboards, soundcards, graphics card, wifi router, ethernet card, and even 7 old cellphones. The cellphones have the 4 pin SMD oscillators as well as resonators, but none in the desired frequency.
I tried 555 oscillation for AM radio and I thought it was too noisy and weak. I'm considering having the arduino feed input into the mic input of a walkie talkie...but I find that to be overkill and not as fun. :/
I have a broken radio controlled car. I'm going to try and reconfigure the radio circuit to send my own signals via arduino.