The idle on the car is ok, but its never been perfect. It seemed to be getting a little worse, in a way consistent with a vacuum leak. So I decided to replace the vacuum lines under the intake and the idle control valve, as the hoses were noticeably cracked and this is a common cause of this issue. While not difficult, this is not trivial. I had to remove the throttle body and intake. Here's a shot of it torn down.
I had to take it off to verify the parts to order, and while I wait for those to show up, I decided to go ahead and paint the intake. Pimpy, but given the cosmoline and dirt on the motor, I figure painting it black is a good way to dress things up a little. 1 coat of engine paint primer, and 2 coats of gloss black engine paint.

Here is a shot of the intake, cleaned and primered. I cleaned it with simple green and brake cleaner. A good greenie-weenie scrubber and water came in handy.
Here is a shot of the finished product. After painting I sanded the raised portions.
The engine paint says it take 7 days to fully cure, and since I have to wait for the parts to show up, it's a perfect time to do it. I'd do the valve cover as well, but not yet, I'll get to that later. Total cost in paint is $15, with enough extra to do the valve cover later.