The front page needs something like 'noobs click here' and then a brief outline of what a course management system actually does. Many/most people I talk to about moodle say something like "That sounds great. What is it exactly again?".
When I first used moodle, it was several days before I really grasped what it was all about and the topmost resource in the using moodle course is not helpful at all as it assumes a lot of prior knowledge. An introductory video would be great - did GHOP make anything suitable?