I'm thinking of putting a grid on the homepage to list out the top 5 FAQs per category and a "view more" link. The top 5 will be based on either the number of views or the highest rated items.
It's like having many "Most Popular FAQs" but filtered by different categories.
Maybe this might help in visualizing the format:
http://www.telstra.com.au/help/index.html
Any tips will be much appreciated!