Ubercart

Views.

There's your pointer, but here's a little more explanation. You'll need to set up a View that filters nodes on "Is a Product", with an argument based on the taxonomy term. Then, you'll set it so that it includes a pager, and only shows one node per page. I'm pretty sure there's a way to get Views to display the entire node, like on its page, instead of the grid or table row style.

Have you looked at Custom Pagers?

http://drupal.org/project/custom_pagers

After setting up your views you could enable a custom pager for your products which would then add previous and next links to your product nodes.