Have you or anyone tried one of these? I was under the impression that the iPhone adapter was wired differently than what an n900 one would need to be - but I haven't actually tried and couldn't find any suitable accessories on my travels around.

joerg_rw posted a reference document recently over here for the headset wiring - http://talk.maemo.org/showpost.php?p...&postcount=163

Otherwise, I've got an old headset, a soldering iron and a bunch of adaptors ready to be sacrificed to the Great God of Tinkering.