I've just updated this so I thought I'd see if anyone wanted to try it out.
That's seems like a great resource for getting into chaos theory. I love all the user-controllable applets.
One niggle -- I don't believe that it's accurate to say that the logistic map is more familiar to biologists than the logistic growth equation. I believe that the most familiar growth equations to most biologists are differential equations, such as the logistic growth equation:
dP/dt = rP*(1-K/P)
or
P(t) = [KPo*e^(rt)]/(K+Po[e^(rt)-1])
In general, I believe that most population modelling still relies on differential equations and chaos is ignored except as a special case for certain systems. Chaos doesn't really creep into the general ecology curriculum, except perhaps for theoretical ecologists. I'll check my ecology textbook to see where/how the logistic map pops up.