Motorola's Atrix 2 and Droid Bionic have both had their fastboot files leaked in recent days, providing a bit of insurance for daring users and developers alike. The Atrix 2's files are available here, while the Droid Bionic's fastboot set can be found here.
For those not in the loop, fastboot allows users to flash unsigned partition images via USB (including recovery images), meaning it is possible to bring a device back from a soft brick. The process is not for the faint of heart, but certainly comes in handy in a pinch.
Now that these files are available, development for both devices will certainly get a little more interesting. To grab the downloads, just hit either of the links above!
Thanks Caleb and Open1Your1Eyes0!