Please ask any questions that you have, because if you've got a question, it's likely that many others do as well.  To go a layer deeper into our tech stack for just a second, basically there are two components to our databases:

1) Tendermint Blockhain
2) CockroachDB used as  dist kv store

We're doing this explicitly to reduce the amount of anything stored on-chain.  Instead, to write to the CockroachDB instance underlying the chain, content must first be hashed.  That hash is then stored in the blockchain so that the content is verifiable.  

The biggest use case that I see for this stack is web applications.  Let's look at github.com/nodebb/nodebb for a second....

We can see that Nodebb supports mongodb (ick) or redis (awesome!).  So imagine that we could use the redis protocol to talk with Dawn from a nodebb front-- basically, all your states are belong to us (if you want them to.)