Okay, so I ended up finding this site which had directions and the .902 fastboot xml file. I had to go to XDA to find a good download for RSD Lite (version 5.6).
Droid Bionic » – FastBoot Files 5.9.902 HOw to Flash / Unbrick
RSD Lite 5.6 - xda-developers
Both of these sites saved my @$$. After my phone rebooted I had to reconfigure everything. It wiped all of my internal storage and phone/app data. It's all good though, I was completely dead in the water before!
For RSD Lite to tell me that the process was done and successful, I had to toggle through USB Modes on the phone until the correct mode was selected and Windows loaded the drivers for that mode. I think it was actually PC Mode that allowed RSD Lite to see the device again. It tells you to manually power on the device until you select the correct mode.
Droid Bionic, No longer rooted. Maybe I'll try again. I don't know if having root somehow caused this problem, but I've been rooted for a couple months and have let my battery run down before. It seems very odd to me how this happened.