There have been several requests on the Ubercart forums for a Google Base feed of the products in a store. I first attempted to do this using Views and the Views RSS modules, but due to some of the custom required fields it wasn’t doable.
However, it was very simple to wrap up into a small contrib module for Ubercart which I’ve uploaded here.
The module allows you to customize the feed title, link, and description via its settings form. It includes all taxonomy terms for a product in the product_type field and uses the first product image for the image link.
Please direct all comments, suggestions, and critiques to the contrib page.