Check it: http://www.inbflat.net/
Incredible idea. This in Bb project was inspired by Terry Riley's similar project in the 80's. Also check out this Buddha Machine someone made using the site.
Speaking of scales/chord progressions, this reminded me of the YouTube video showing over like 50 songs that all use the same chord progression. So crazy.
Oh, and credz to my man Joey Lubitz for sharing this.