This is hands-down the most esoteric question I've ever posed on this site, but here goes:
Following the instructions on Cyanogen Mod's site I was able to make it as far as flashing the linked recovery image.
However, now that I've done that, Ubuntu no longer recognizes or mounts the device, so I can't proceed to the next step.
I'm at a loss as to what to do at this point, so any advice would be appreciated.
Add your device's vendorId to home/.android/adb_usb.ini file and then restart the adb server. If that doesn't works, please reboot your system and connect your device to a different port and check. Hope it solves your problem.