TPS failures - better designs?

[Peter Gargano]

Dear EFI gurus,

I was at the wreckers (bone yard?) yesterday. Seems
that the Throttle Position Sensor is a common point
of failure. Being a novice when it comes to GM EFI 
hardware, I figured that a better design than a simple
pot (potentiometer, or "variable resistor") was in 
order. Having recently played with a Hall Effect sensor,
for ignition pickup, I also figured that a simple TPS,
both reliable and robust, could be done cheaply and 
easily with just such a Hall Effect device.

As we all know, "there's nothing new under the sun"...
So, here's the EFI content:

  Are there any Hall effect TPS sensors around?

Or, perhaps a better question is:

  Are there more reliable TP sensors than simple pots?

TIA,
-- 
Peter Gargano