I've uploaded the ability for registered members of the beatcanvas gated playground to post content. If you go to the main page, you should see a link for the Gated Playground. By accessing that, you can create new articles and edit those that you've written.
One fun thing: you can select the template to change the way your post appears. Choosing nothing gives your post the default look.
I'm still messing with all of this, but it's getting there. If you run into an error, let me know.