Provides a live product feed for Google Merchant rather a file that you have to upload. This is a very basic extension so feel free to help improve it!
To access the feed visit:
http://yoursite.com/products/google_merchant.rss
To start with you'll need a Google Merchant account. Then:
gem "spree_google_merchant", :git => 'git://github.com/sebastyuiop/spree_google_merchant.git'
bundle install
To configure the feed title, description and site URL go to the Google Merchant settings page in Admin -> Configuration
Copyright (c) 2011 sebastyuiop, released under the New BSD License