The JS Bin learn site is all available on github, so it's possible you were after a page that doesn't exist yet, so if you're feeling brave, we'd love for you to go ahead and send us a pull request for the page you were looking for.
If you had a specific question that wasn't answered, or indeed this is a bug (and you expected to find a specific page), please do take a minute to file an issue to help us help you.
Otherwise, Dave says "Hi"!