S3 Hosting for HTML5 apps

index.html

<script>
  history.pushState({}, "entry page", location.hash.substring(1));
</script>

RoutingRules.xml

<RoutingRules>
  <RoutingRule>
    <Condition>
      <HttpErrorCodeReturnedEquals>404</HttpErrorCodeReturnedEquals>
    </Condition>
    <Redirect>
      <HostName>yourdomainname.com</HostName>
      <ReplaceKeyPrefixWith>#!/</ReplaceKeyPrefixWith>
    </Redirect>
  </RoutingRule>
</RoutingRules>

Source: http://stackoverflow.com/questions/16267339/s3-static-website-hosting-route-all-paths-to-index-html