I was looking for a library for the QTR Reflectance Sensors on the mbed platform.
But I could not find one.
So - I re-purposed the Arduino library for mbed.
I have notified Pololu that I had created this and they (Amanda) suggested that I post this information on this forum.
Note: it is just a first-cut and may need some corrections.
I have only tested with a QTR-8A, I do not have the QRT-8RC or any other reflectance sensors.
Let me know if you need an example program.