Thanks for posting those Scott - I just read them last week and was trying to remember where so o2zen could get some good info!
These are scary things, as you'll read. I wouldn't assume that anything has eaten it, even if they have, it can eat through whatever's eaten it.
Also, be very careful handling the isopod if you come across it. In that first link (I think) Dr. Ron shares the story of one of the lab assistants needing to remove the isopod from her own hand.
Good luck!