A brief overview of Riak [0] and Riak CS [1], followed by details on multi-tenant usage and billing statistics.
After the slides, there is an interactive demonstration [2] on how to consume the statistics from Riak CS.
[0] http://basho.com/riak/
[1] http://basho.com/riak-cloud-storage/
[2] https://gist.github.com/hectcastro/126b5657f228096775c6