Some more seo tips: links seem to be the most important at the moment; my suggestion:
rename your template demo-area to:
http://joomla-templates.rockettheme.com/this will generate internal links that google loves.
On this page you can use the no-frames content to make a few links to static pages with extra information... and links with joomla-templates in their name
If to many people only find your demo area make an inviting link to your hompage and an option to become a member.
succes, Joost Kolkman