Happy pinning is turning into happy shopping.
Pinterest, the 5-year-old digital pinboard start-up, is getting into the e-commerce game by providing a way for users to directly buy items pinned on the site.
The commerce feature could be an enormous hit given how many pins -- 50 billion across 1 billion boards -- there are on Pinterest, and how devoted many users are to the fast-growing site. Pinterest currently has 70 million monthly active users, and the total number of pins on the site is growing 75% year over year.
Silbermann said that e