My very first post! I just ordered a 7135 because I'm hooked on Palms
and my Palm IIIx is getting too big and ugly to carry around along
with a cell phone.

The MP3 feature is a key selling point. What's a good stereo plug
adapter to use? Need to convert the phone's 2.5mm to normal 3.5mm
stereo jack (e.g. for regular headphones). The phone has a 4-pin
connector, so it's not a regular 2.5mm type.

This one looks interesting: http://pc-mobile.net/ky7135.htm

I just bought one of those on eBay from a fellow who ordered several from the orient. It hasn't arrived yet. Apparently that adapter is the only convenient one that will work.

yes, PC-Mobile's adapter is great.
They're great people as well, and ship fast.