If you're not satisfied using your iPod while you're running, jogging, while in the gym working your sweats out, or when you don't want to ride your sport cars anymore because of the terrible traffic jam but don't want to miss a beat of your favorite tunes in your iPod.
Then you can hope for the best with newest bike that is coming out from Cannondale, where it'll provide a mount for your iPod along with a rear view cam and stat tracking on how many miles you have pedal of your feet from home to workplace.
Although this is still in the stage of concept, but the rendered 3D image is very confincing. (click on the thumbnail pic to view it larger) Sources are from Cannondale, via Gizmodo.
[blogged with my Treo 750v]