Comcast, Boundary, Enstratus, Alert Logic, Best Buy, Voxer, Showyou, Bump, bunch of random startups. Finds its way into a number of places, since it's one of few AP databases that actually puts sibling resolution in the hands of app developers.
Interesting, I had no idea they had such a following. Github doesn't surprise me, they seem like the kind of company that would dabble in any technology just for the hell of it.
pvnick, this is the wrong place for this, but wanted to see how your warrior dieting was going, you dont have your contact info in your profile. email me if you want by checking mine, cool.
Each of these DBs involves about 25-50 hours of research, coding, experimentation, back-and-forth with the DB authors, and writeup. I'll do Cassandra some day, but this is about 3 months of work as it stands. :)
Edit: That sounded mean. It wasn't meant to be.