Here's a bit of good news for anyone with an unrooted Motorola device - the root method released earlier today by Dan Rosenberg for the Xyboard/Xoom 2 should actually work on any Moto device that's running Gingerbread or Honeycomb. The direct quote, from Dan himself:
The Droid 4 root ("Motofail") should work on all Gingerbread Motorola devices that I know of. The just-released XYBoard root ("XYZ") should root all Gingerbread and Honeycomb Motorola devices. Both Motofail and XYZ rely on the same vulnerability, but the XYBoard had an additional hurdle in place that required me to exploit a second bug in order to trigger the first one.