Sadly, Apple has not released an iPhone with a standard headphone mini-jack (the current recessed receptacle won't fit most mini-jacks). I'm getting the feeling they never will.
Sigh. Faust would understand.
I figured I'd have to buy a stupid dongle or whittle down my Bose QuiteComfort 2* headphones. Turns out there might be an alternative -- the $40 Bose QuietComfort 2 Mobile Communications Kit. Sure, it's much more expensive than whittling, but it includes a microphone so you can handle incoming calls. On the other hand it only works with post-2005 QC2s. (I might get away though, my original QC2 was replaced for free about a year ago.)
So if you have an older set you probably want to call Bose with your serial number before you buy.
* My one extravagance. There are now good alternatives for about half the price.