It used to be a PRO feature to use multiple external resources on a Pen. No more! That feature is now available to all users.

Not much more to say - we just thought that was a bit of an arbitrary restriction considering you're free to <link> up additional stylesheets or <script>s from the HTML anyway. Might as well not limit the ease of building awesome stuff.

We updated the documentation to reflect this, which includes information about using Pens-as-resources, which is a pretty cool feature that works great with this.