Good answers guys, but we should think beyond advertising as a link on a page...

Depending on your site, you could get donations from companys in exchange for good reviews, some exposure or whatever. (thats more of a member-building thing though).

Another thing you could do is offer services related to your genre (for example, sell movies which you buy in wholesale, offer webhosting, etc.)

Do your own advertisement scheme, google is underpaid. Charge like.. $10 a month to put them on banner rotation, and have a few advertisements around the place.
For eg/ at the bottom of the page and top of the page ($10 a month for banner rotation at the top, $7 a month for the bottom).

Just general things like that. When you have the member base, there isnt too much you cant do (Just DONT over-do it)

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