Following last month’s official launch of the iPhone on China Unicorn, China’s most popular online retailer is reporting much lower than expected sales of official iPhone units in China. Taobao.com, the largest Chinese e-commerce web site reports that it has sold only two 8GB iPhones and three 16GB iPhones since it began selling them on Nov 22nd. Although China Unicorn is also selling the iPhone directly, Taobao is considered to be China’s…