I now have the Bose adapter (Bose® QuietComfort® 2 mobile communications kit). ^_^ This is for the Quiet Comfort 2 headphones. I stopped at the Bose store on the way to work. (There
are advantages to living and working around here.)
The wire that connects the headphones to the iPhone includes an inline microphone that is a microphone only. It does not include a clicker. That means you cannot click to answer a call, click to pause the iPod function, or click to skip through podcast chapters. Also on the cord is a movable clip you can use to anchor the cord to your clothing.
Plusses? It works. The main cord works in the iPhone without needing one of the four supplied adapters. Yay!!!! I called my wife using it, and she can hear me just fine. She has a profound hearing loss, so she's a good test. If she can't hear or understand me, then it's useless to me. However, given she can hear me, it's a keeper. I can hear her just fine over the headphones, though I can barely hear myself. Doh. These *are* noise cancelling headphones after all.
Btw, in my phone test I used the clip for part of the call and didn't use it for the remainder, allowing the microphone to go where it wanted. My wife could hear me fine in any case.
Minuses? The lack of a clicker stinks. For $40 I expected more. It isn't as if Bose is providing speakers or anything like that.
The microphone looks a tad clunky, and the wire feels cheap. The microphone on Apple's earbuds for the iPhone is an elegant little device. In comparison the Bose one seems rough hewn. I'm being unfair I'm sure, but that's how it is. The wire is quite adequate I'm sure, but feels cheap in comparison to the normal wire for the Bose QC2 as well as that in the Apple product.
Also, the plug that goes into the QC2 lacks a Lo/Hi power switch. It's okay, but again it seems as if Bose did this a bit on the cheap.
Overall
Overall I'm satisfied with it. I'm not impressed, happy, or pleased, just satisfied. They could have done better, especially at that price, but it does work and is serviceable.