I have a nearly new iMic audio in/out USB adapter from Griffin Tech and a new ( out of packaging) USB /serial adapter for PDAs from Keyspan.
I just got USB Monsoon Speakers and returned my Palm Vll, because compared to a Newton 2100 the Palm is an overpriced toy.
Make me an offer for either or both and we can do a Pay pal transaction, my email is starbelly@mac.com