Nothing for the iPhone will work. In fact, nothing wired seems to work apart from the stock, not even Nokia's jacked remotes - BT seems to be the only way of getting functionality like this. Whenever I'm using the N900 as my main phone, I therefore have high-end IEM's running off the Nokia BH-214 at the moment, which is clearly lunacy given the sonic limitations of Bluetooth. If you find something, let us all know as I'm defo looking for a 3.5mm jacked, wired, mic'd remote - and being unable to unearth one, it's just one of the reasons I'm thinking about putting the N900 on the scrapheap. It may be a nerd's delight, but there's too many of the basics it does abysmally, or not at all.