Here is the search link http://www.google.com/search?q=kingdom+arcade . If that means I am an Authority Site than that just makes my recently lowered PR even weirder.
No, there is NO SUCH THING. Google has never described any site as an 'authority site', it's a just a slang term that vaguely means a well-regarded site, it has no official sanction from google whatsoever. Google are using sitelinks a lot more now. That's all it means
Those are just sitelinks.... http://www.google.com/support/webmasters/bin/answer.py?answer=47334&topic=8523