SocialClerks is a huge social networking site with Twitter, Facebook, Youtube, Delicious and more on it. It is one of the best looking on the web and owned/operated by a trusted brand (Ionicware Inc).
As I mentioned in my other review about ListingDock, I've used SEOClerks for years now. I've been a seller that quit his full time job because I made so much money with them.
This is a spin-off of their SEO site, SEOClerks.com. I've used it for years now and when they launched ListingDock.com I got excited. Although the traffic isn't great yet, it will be. I've listed all of my crafts on the site and even had one sale which I didn't expect. Support is amazing.