Thanks for mentioning that bug for me. I've fixed it now.
You can get anything that is returned from the query in the JSON. You could setup a simple console.log() during development to see all of the available information you can pull from. Different queries obviously return different information but the one used in this app returns a TON of information for you to use.
RE: [Steem] - Building your own Steem App like "steem.cool" Quickly, and understanding how you did it!