The coolant was new in July of '99. Since then I have put 50k miles on. Although time wise it wouldn't be time to change, I would imagine that mileage wise, it is probably time. The coolant, as far as I remember, was its reg. color before adding the WW. Now it looks a little like coffee with just a touch of cream.
So, looks like I will be doing a coolant flush on Saturday. I'll keep my eye on it for a while, and then will add WW, and see what happens next.