I host this at http://www.eater.net/khanissues, but there are no server dependencies. You can just as effectively run it from your local filesystem if you like.
There is also an OAuth-enabled version (which allows 5000 request per hour) at http://www.mattfaus.com/khanissues/index.html. Or, you can revert back to unauthenticated queries with http://www.mattfaus.com/khanissues/index.html?noauth=true
Copyright 2011, Khan Academy
Inspired by igort's Pretty viewer for Khan Academy issues.