Liquor Cabinet is where Frank stores all his stuff. It's a remoteStorage-compatible storage provider API, based on Sinatra and currently using Riak as backend. You can use it on its own, or e.g. mount it from a Rails application.
It's merely implementing the storage API, not including the Webfinger and Oauth parts of remoteStorage. You have to set the authorization keys/values in the database yourself.
If you have any questions about this thing, drop by #unhosted on Freenode, and we'll happily answer them.