The Export Products feature in your Shop's Administration page will now include the variant barcode for each of your products' variants and the alt text for each of your products' images.
The Variant Barcode column has been added between the Variant Taxable and Image Src columns on each line of the product export file:
The Image Alt Text column has been added to the end of each line of the product export file:
This change was put into production on July 18, 2013 at 12:00 EDT. If you have any custom processing of the Products CSV file that Shopify generates, please ensure that you update it to handle these new fields.