The good thing about the Internet is that it lets people with strange obsessions find like-minded ones. Here's an example: SHARE YOUR ZEN MICRO PICTURES! has hundreds of photos of Zen Micros.
There is also a poll on the favorite color, although it is a bit strange in that the vote has to be based on the photos, and cannot be the color of your own Zen Micro. Results thus far:
1. Black - the color of mine!
2. Dark Blue
5. White - would be my second choice.
5. Lime Green
10. Light Blue