Lefty,
I did a search as you suggested and found lots of information, but it described absolute positioning and included lots of complex math using pitch, roll, and yaw. This is not what I was needing. I only need a linear travel distance.
I wanted to use the x and y axis to determine travel distance (use of the y-axis is in case the unit was not perfectly square with the x-axis and so I can use vector calculations). This, I think I can handle. I also understand if the device were not level, it would induce a fair amount of error in the x and y acceleration measurement. This is where I need some help with the corrections.