...Technology partners announced this week include Avalara, whose AvaTax application integrates with Magento for calculating sales tax and other transactional data; e-Dialog Express, a unit of eBay’s GSI Commerce, for e-mail marketing technology; and Fanplayr, a provider of online coupons and games used in social networks.

Read more here:  http://www.internetretailer.com/2012/04/24/magento-moves-further-mobile