Too true, the front page is built far too much with existing users/contributors in mind.
The only part of the page that says what the product "Mozilla" is ("Mozilla is an open-source web browser and toolkit, designed for standards compliance, performance and portability"), is hidden down in a small sidebar on the RHS of the page, and there's nothing mentioning the philosophy or goals of mozilla.org, or what other software and tools Mozilla.org have created/distributed (eg Gecko, Bugzilla, Rhino etc).
The problem is that a newbie who's been told there's this great thing called Mozilla that all the cool kids use, is likely to be scared off by talk of Mozilla Parties, Roadmaps, Geckos, Hacking and source long before they spot the description and download links of the browser.