eBay has just settled its differences with Tumbleweed Communications Corp. Tumbleweed had sued the web-giant for infringement of its patented technology for sending personal links via email. Tumbleweed had previously settled with other heavyweights like American Greetings and Hallmark. eBay settlement involves a cross-licensing of technology between Tumbleweed and eBay. No other details of the settlement, including the settlement amount, have been released.