03 - 08 Toyotas (1.8 and 2.4) had an issue with oil leaks. My 03 Matrix bought used about 3 years ago with 80k miles, and had to replace all gaskets. I guess Toyota was trying to cut corners and oil leaks is what happened. Just the nature of that particular beast.
thanks for the info! I am towards 70k miles, and that makes a lot of sense that it's coming from the valve cover gasket.. Since there isn't any oil sources around the air intake manifold (itself).. Thinking what you're saying, it IS 14.5 years old now! Guess nothing lasts forever.