In general, any standard oscillator circuit can be used as a Regen receiving circuit by backing off the feedback so that the oscillator just stops oscillating; at this point it acts as a high gain, narrow bandwidth Bandpass Filter resonating at the frequency you've tuned it to with the main tuning capacitor.
so what I want to do is take a standard 2-transistor astable multivibrator (you can find it at 4QDTEC's website, and a zillion of others) and convert it into a superregenerative detector. Who can show me how this is done? or do you believe that the above URL is giving false information?
Yes, any resonating circuit (such as a oscillator) will act as as a band pass filter. Depending on the resonant frequency you have set the circuit to using the tuning capacitor. Remember the formulae for resonant frequency is 1/2PIE x (rootLC).