Despite my strong belief that people who are interested in rooting should buy devices with unlocked bootloaders instead of expecting the magical hackers in the sky to give out free exploits (which are in short supply), I'm once again continuing to encourage bad behavior by publishing another root exploit:
1. Download and extract the entire zip file.
2. Ensure your device is connected via USB and that you have installed the latest ADB drivers from Motorola.
3. Double-click "run.bat" and FOLLOW THE INSTRUCTIONS. The exploit will ask you to press a button combination at one point.
If the exploit prints an error saying something like "run-as: Package 'com.motorola.bug2go' is unknown", then unfortunately you will have to wipe your data and cache partitions and try again.
This exploit should work on the Razr M, Atrix HD, Photon Q, Razr i (you might need to replace some of the binaries with x86 versions?), and the upcoming Razr HD.