SocialTwist has appointed former Google head of product marketing Sanjeev Agrawal as president of the company, a new position. SocialTwist, founded in 2008, provides marketers with social shopping options including the Tell-A-Friend platform. We spoke with SocialTwist’s CEO Vijay Pullur a couple of months ago for a story about social commerce, which you can check out here.

SocialTwist has also announced that 100,000 brands and websites are using the service, and 4.8 million shoppers have used Tell-a-Friend. The platform is available across Facebook, Twitter, Gmail, and other sites. Clients include P&G and Barnes & Noble.