I was wondering if there are any product level datafeeds out there. I would like to provide our users with more information on a certain product by listing the product attributes. This data is not listed in the traditional affiliate feeds.

For example, under Digital Cameras, I would like to list the megapixels, resolution, zoom, dimensions, memory type, etc.

Is there a source that could provide such attributes based on UPC or ISBN numbers? Or would I have to contact and request a feed from each manufacturer? Is any of this possible?

Thanks for any help
- John