Too many social links?

You see the links everywhere. Digg. Stumble. Add to Google. Redit. Del.icio.us.

It's clear that social media is here to stay. So how much social media should you put on your site? Will adding these buttons to your blog, to your content, or to your store bring you more visitors? More traffic? More sales?

Leading usability researches such as FutureNow, e-Consultancy, and others have done endless research on usability and e-commerce shopping. We've also done research in the wine industry.

As far as social media links, I've yet to see an research on the effectiveness of these links and I personally feel that the jury is still out but that studies are coming (and perhaps in the works right now)