This is supposedly just a P89LPC938 with half of the flash removed and several of the peripherals removed (CCU, EEPROM, XDATA ram, etc.) to reduce cost. I haven't been able to get any information yet from my FAE regarding the device ID / Signature, but I just asked. If there's anything I can do to help, let me know. It would be awesome if the program were user-extensible to add devices via some sort of device definition file, but as long as your willing to keep up your awesome level of device support, I guess that's not necessary! :D
See my related post here for a follow up:
http://forum.flashmagictool.com/index.php?topic=3532.msg4464#msg4464