You know how blown away I was when I saw this at your Steemfest session. We've been desperate for decent search. Every front end should incorporate it.
I am experiencing some errors, e.g. if I just search for myself 'author:steevc'. Sometimes 'An error has occurred', but I still get the results. I appreciate it's early days.
You need a help screen so people know about the special commands.
Thanks, Steve for testing out and giving your feedback! Yes, we are working on help screen or at least incorporate this post into Web page.