I agree. I think it's a fantastic product, but the mp3 market is so dominated by the iPod, it's insane. I bought a Zune about a year or 2 ago and I can't find any decent accessories for it anywhere. I bought a new stereo system for my truck and figured since the dock had a USB connection that my Zune might work for it, but it is just for iPods. There aren't any alarm clocks that take advantage of the Zune. Even the new AV Receiver I bought has a USB strictly for iPods.
Just the amount of things you use in everyday life now are starting to support iPods, even though I believe the Zune is a better product, if I had to go out and buy a new mp3 player today, I would get an iPod for sure just for that reason.
Hopefully once they fully integrate the zune into the xbox 360, it will start making a bigger name for itself and be able to gain at least a little bit of ground.