Not really.
If I were you, I would search google.
Among the first results:
Something like this may solve your problem.

However, be careful and don't order them from E-bay!

Instead, look for this stuff in a local store and try it out before buying. That is the only way to be sure.

It won't. It's just a cable extender, if you read the description : "Made and designed to work seamlessly with the Apple iPhone." I guess it would work to plug Nokia headphones to a Nokia phone, but not to convert the signals between Apple and Nokia.

The tape-wrapping is a better solution.

I bought a cheap adaptor that allows you to plug two sets of headphones into one socket. The adaptor only supports headphones without the extra mic connector so it effectively just ignores the extra band around the apple deluxe headphone plug and allows audio to pass through without the grounding issue.

This obviously won't enable the mic on the apple headphones but at least you can listen to music with them.

The good thing about this approach is that it doesn't really add much bulk when plugged in as the adaptor is nice and small.

I've noticed that this works, but even with tape or something it's not exactly a permanent solution. And it's not only that apple headphones don't work with the N900, as I mentioned before. Is the only lasting solution bluetooth headphones or nokia's own headset?

Well why don't you just use normal headphones and not some other companies headset? All of my headphones work great with the N900

i think you should sit the two of them , the phone and the headphones, down and make them talk and sort this silliness out. lol jus tkidding. a lot of apple products are like that. its like apple doesnt want its products to play nice wioth other stuff. but not just apple. my dad black berry head sets with the microphone (came with the phone) will not work in my n900. nor will my headphones with mic work in his black berry. i think it has something to do with the mics being made in a specific way to match a specific phone

Trust me on this one, I had the Bose mobile in-ear headset, which was compatible with the iPhone. Once I got my N900, it won't work. So I decided to get an adapter, I ordered 5 different adapters but none, none of them worked. So I had to sell it and get other one with out mic.

I guess I've just had back luck - which ones do you have. Also, maybe I haven't been specific earlier, but I actually meant headphone+mic, not just headphones - because headphones on their own also work just fine for me when the mic isn't built in, but obviously that's a desirable component.

confirmed working with my UE iphone mic/headphones and n810

All you need is a normal 3 band 3.5mm extender (your best bet is probably just an L bend adapter since those are fairly small and serve some use, also probably available at radio shack). iPhone compatible headphones are designed to work with normal 3.5mm jacks, and so if you plug your headphones into a 3.5mm female jack, then the 3.5mm male won't know the difference, and thus, your n900 will treat it just as any other pair of headphones (shrubbery does essentially the same thing, since both male and female parts are 3 band).

This method disables use of the mic, so if you want to be able to use it, you will want to get a 4 band to 4 band adapter that correctly re-arranges them (as others mentioned)