I'm not sure what the demand is for this, but I've compiled the latest OSBDM-JM60 driver for linux. It is successful connecting to a M52259DEMO board with the m68k-elf-sprite. I haven't been able to test it much since I'm just now starting to work with the Coldfire. You can download it here: http://wykwyw.com/osbdm/libosbdmJM60-0.0.1-tar.bz2