Hmm well I like the idea of the links being mirrored on our links page and in the dept folders. If someone is checking out our links page for something, or just exploring then they are more likely come back if they keep hitting cool sites even if they arn't related to the site they were looking for. At the same time I like the idea of the links being in the  folders so they can read about a product and then go to that companies home page.
We also need to put links to Amazon or something in articles so people can go there and buy the product from our website...
They call it Amazon.com associates
heres some info from their website.
Why Join?
Link Up with the Leader. We have the largest and most successful online affiliate program. Over 900,000 Web sites have joined Amazon.com Associates because our program works for you. If you are a Web site owner, Amazon seller, or Web developer, you can start making money today and earn up to 10% in referral fees.
Participation is Easy and Free
You place links on your site to Amazon.com.
Visitors click from your site to Amazon.com and purchase items.
You earn up to 10% in referral fees.
More Associates Information
Feel free to read more about our program. We have information on and examples of our reporting, graphics, and communication.
Start making money today. Click here for easy registration.
Even if we only sell a few books 10% is enough to buy you guys a pizza every now and then... and who doesn't like free pizza.