Vibration-Ball joints, wheel bearings, tie rods, lower control arms.
Jack up the car and check lower control arm bushings. As for the others do the 12-6 and 3-9 o'clock test.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1285671&Forum=trouble&Words=o%27clock&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=1week&Main=1285070&Search=true#Post1285671

Loose feeling-steering column (check for missing screws under the column).
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=susp&Number=1289888&page=1&view=collapsed&sb=5&o=31&fpart=1

"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles