You may already have contacted Lost and Found at the Ticket and Transportation Center; throughout the years I have had to visit them on quite a few occasions!
In July I lost my sunglasses on the Dinosaur ride in AK. At the Lost and Found, I looked through at least 10 trays, each of which held between 20-30 pairs of the plastic framed glasses. This was 3 days worth of glasses lost just from Animal Kingdom alone! Unfortunately they were not there.
But while I was looking, a Monorail driver came in with both arms full of items, including about 3, one of a pair, sandals/flipflops, sweaters, and a camera with its case, as well as a camera case. He said that these items were just from his morning trip.
Hopefully someone turned in your ipod. ( A few years ago my DGS autograph book was mailed home to him).
Good luck and pixie dust!
June