Luis, thanks for the offer of assistance. In pulling together the files for you I found the problem. Before zipping the files I decided to pull down a fresh copy of the i2cdevlib and diff my I2Cdev and MPU6050 files against it. Apparently I had somehow installed the older 2013-05-05 I2Cdev on my system. I swapped in the 2013-05-06 (current) version and everything worked as advertised.
