I've uploaded to the contributions section related to products and inventroy: UC Stock & Price Updater.
This is a module that tries to cover a hole on the Ubercart ecommerce system: being able to update stock level and prices at once from a single file. Use this form to import stock data and sell prices into a Ãœbercart online shop from a CSV file. That way every day a real store or wharehouse for a group of physical store will be able to export from the central stock system a file with real stock levels that can be imported into your online Ubercart store. Imagine what would happen if you try to update stock levels every day on 500+ products store...
On that page http://www.ubercart.org/contrib/12428 you'll find more information on how to use it and how to customize it to your store needs.
Discuss here whatever idea you have about it 