Simulating Network Partitions on a Riak Cluster
aphyr.com
aphyr.com
Edit: That sounded mean. It wasn't meant to be.
Braintree is interesting as they process credit cards for a LOT of startups e.g. AirBnb, 37Signals, Uber, Fab, Living Social.
I appreciate the work you've done here. It's also a little sad that this level of examination is so rare.