Importing old site data into WordPress

Hi all,

I am moving a large mysql driven site from my old custom solution to WordPress. I have a ton of content that I want to import. Is there a fast way to import my old database into WordPress (I’d like them import them all as drafts if possible so I can review each page).

Can anyone suggest any tools for doing this quickly? Or do I need to write a script to facilitate the transfer?

Thanks!