Free shipping is now a verifiably successful trend, with nearly 50 percent of online sales in 2010 including a free shipping deal. That's more than a 10% increase from 2009, and the future looks even brighter for 2011. But did you ever stop to think how many different offers are available? We've done some research and came up with the following seven different types of free shipping and shopping trends related to the most popular online shopping promotion.