That first one is weird. I'll have to save it for a rainy...oh...it is raining. Maybe a weekend then.
I like the one where all the silhouettes are making the music. It reminds me of something Steve Reich would do. We're just finishing off Steve Reich in music so I'll have to show them that.
Have you ever thought about making your own newsletter of random sites that you find and sending it out every week with the best you've found and ten of the rest?