Thanks again to all who posted in response to my scanner question. The $79 scanner I bought, an Actron Pocket Scan (regularly $99 -- on sale now at Auto Zone), indicated an MAF failure. I have now replaced the MAF sensor ($80 for a re-manufactured Bosch unit) and son of a gun, it runs like a champ again.
Those of you considering a scanner, the cheap Auto Zone unit works well, erases the codes, turns off your check engine light, has a complete listing of all the codes' meanings, is solidly-built, and is updatable. $11 less than my dealer wanted just to read the codes. See it here: