Further, if the Zune software becomes the "WP7" software, I won't really care so long as it still works with my existing devices.
If, on the other hand, my existing Zune stuff is ultimately gone and no longer supported, I guess it's back to Amazon MP3 for me.
I love my Zune, even when it came out I would say things like "Microsoft products generally suck, except the Zune is a pretty sweet device - they did that right". My opinion of MS has changed for the better since then, and it started with the Zune.