Here is a nice example of a compensated, opamp-based circuit that interfaces the PT100 to a microcontroller ..
**broken link removed**
It's based on MAXIM opamp, but I can't find any reason why it wouldn't work with any other rail-to-rail device ..
Here is another one: "A precision interface for a Resistance Temperature Detector (RTD)"
**broken link removed**
Again, you are not obligated to use the specifically indicated opamp .. any rail-to-rail will do ..
IanP