Google Checkout is now offering subscriptions for sellers who wish to offer them. The option is available through the Beta Features page. Merchants can set up recurring billing through the API as well.
If you're not familiar, Google Checkout offers shopping cart functionality in a way similar to PayPal, which is owned by eBay. In April 2007, eBay teamed up with Yahoo to challenge Google Checkout, part of the ongoing search wars.
Last October, Google Checkout allowed multiple items per purchase. Recently, Google Checkout announced a new (higher) fee structure that will be in effect this May.
Optimising Digital Marketing Campaigns with Search, Social and Analytics
At SES London (9-11 Feb) you'll get an overview of the latest tools, tips, and tactics in Paid, Owned, Earned, Integrated Media and Business Intelligence to streamline your marketing campaigns in 2015. Register by 31 October to take advantage of Early Bird Rates.