Ideas for my startup (www.prosepoint.org)
SingAlong: When I've got Drupal or Joomla why would I choose yours?
What makes your stuff different from Drupal(+ a custom plugin and theme) or Joomla(+ a custom plugin or theme)?Mention those on the front page. That should serve as an ad :)
And make your site colorful. Pure black-grey-white shades are boring IMO.