A bit blasphemous, I know, but it seemed like a good idea to me! I've set up the boot animation from Windows 7. It looks pretty sweet on my Droid if you ask me.
Thanks to Topsy for hosting the file. It's about 12MB, a bit bigger than other boot animations.
Rename the file to bootanimation.zip before you adb push it to your device.
Here's what it looks like: