Lots of things are potential failures at this point:

1) Ignition switch
2) Shocks & struts
3) Front lower a-arms/ball joints
4) ABS controller (if it hasn't gone already!)
5) Exhaust system if you live in salted road territory.
6) Outside mirrors
7) Inside roof mounted switch for interior lights
8) Arm rest mounted cup holder (if you have one!)
9) Under hood hoses ... any and all can be shot at this point
10) Oxygen sensors
11) A/C evaportor if you haven't already replaced it

Plus of course the standard maint items like oil, belts, brakes, etc.

John