A script to automatically name bones according to the group that occupies the same XYZ coordinates. It would work as follows:

(1) User takes grouped mesh into Setup Room.

(2) Using Bone tool, the user creates bones for each group, and drags them into place.

(3) User runs script, which first parses the skeleton, and stores each bone's center of mass XYZ coordinates.

(4) Script parses mesh for groups, and then gets center of mass XYZ for each group.

(5) Script compares these two lists.
(5a) Errors should be returned if:

• There are more bones than groups. The user is prompted to create such geometry-free bones after the script is done. "hit OK to delete extra bones"
• There are more groups than bones. Optionally, there could be a symmetry function, which could be toggled by having a radiobox for "Only process Left side", and "Only process Right side", with an edit box to enter a tolerance amount (for checking along the spine).
  If there are still too many groups, the script gives a final alert that the chosen side does not comply with the requirements, and then stops.

(5b) If no errors are found, the script attempts to match each bone and group according to their center of mass XYZ coordinates, and rename each bone thusly. Upon successful completion, the script should give a friendly "Done!" message.

I got the idea for this from Paloth and Conniekat8, so blame them if you end up staying up all night creating this script ;p