There are buttons on the main page: http://www.ps3mediaserver.org/
But it isn't entirely clear on first glance those are for downloads so this might be a good idea.
Hahaha, now that you mention it, indeed. I (a) never noticed the logo on top of the page brings you to the homepage and (b) that the buttons on that homepage are the actual downloads. I do think the homepage is very pretty though, a shame I never noticed it before.
I still think my request is valid though; I wasn't looking for a link to the homepage or the downloads, I was looking for a link to the project at Google Code. Seems relevant enough to make it to the main navigation.
How about making the top: (Logo image), HOME, FORUM, FAQ, PROJECT, ABOUT?