gdgt

You may be out of luck, many of the chips headset users make including Klipsch and Shure have chips in them solely designed for Apple devices. I don't think there's anyway to make it work for the Android device, unfortunately.

I have a pair of Sony MDR-EX38IP's, which are plain 'ol Sony earbuds with an iPhone style control - volume buttons and single middle button (pause/play). The middle button works on a handful of apps on my HTC Incredible. Specifically, the stock Music and Movies apps, as well as Beyondpod. The volume buttons, sadly, do not work at all.

Android handles the headset buttons kind of stupidly - only one app at a time can have access to the headset button. Some apps have an option in their settings to say "Enable headset control", which steals the headset access away from the app that was using it. Other apps will just do this without telling you, or using a non-standard API call to get access to it.

However, there are 2 apps that I am interested in, but have not had much time to play with a lot. I would give these apps a try, both are free in the Android Market:
Headset Interceptor gives you an honest-to-god control over what apps have access to the headset button. This guy seems to work fairly well - at least it allows you to set these settings like you would any other default app preference.
RemoteControl for Earphones gives you a rather convoluted set of middle button presses to do the same kind of actions iPhones allow. 4 Clicks go back one track, 2 Clicks skip forward one track. One Click Play/Pause, etc. I haven't had a lot of time to play with this, and the current series of clicks it expects to, for example, change the volume is pretty silly. But it does approach the same kind of control allowed on the iPhone.