I know keeping up with all the social networking sites is a chore but there are certain ones worth your time.
LinkedIn actually has the ability to send traffic to your sites and showcase your ecommerce blog if you use it correctly.
Remember LinkedIn is loaded with real people and all of them are using the site for business purposes. So if you have something to sell to the business community, then you should be there.
Here are some great tips to set up your LinkedIn account so you can actually get some traffic.
http://www.socialmediaexaminer.com/drive-more-blog-traffic-using-linkedin/