Has anyone gotten this to work yet? I'm on 3.4.7 and am attempting to use the built-in Viart feature to generate my feeds instead of doing it manually, but I get errors. Either a complaint that the feed file on my site isn't found, or it starts to generate it and complains a missing character
 
An opening '[' character was expected.
Line: 14 Character: 22
 
I've tried following the directions in the manual at http://www.viart.com/google_base_shopping_cart.html but have not had luck. I've been using froogle/googlebase for years so I know what format they're expecting. Just not having luck through Viart.

I was using Internet Explorer. If I go to view the page source, it looks like the cart didn't build the description string with an opening bracket after the CDATA parm on the Description field:
 
<description><![CDATAThe richest hazelnut flavor you can get. If you're feeling adventurous, try mixing 1/2 Hazelnut Supreme with 1/2 Viennese Cinnamon]]></description>
 
I'll open a ticket.

Have You got the answer?
 
I've the same problem...