This is in EcommerceBytes news letter, Social Beacon will let you promote your item listing to facebook, pintrest & twitter at the same time. It integrates with 3 selling platforms that I will not mention, but you can also enter your own url to your listing for eBid to promote it.
I am going to try it out & see how well it works, seems like it would save some time being able to promote to 3 social media sites at one time.
Here is the link if anyone is interested at looking at it. http://pagemage.com/