As of yesterday, both Bing and Google have confirmed that links shared through Twitter and Facebook have a direct impact on rankings, in addition to the positive second-order effects they may have on the link graph.
This has long been suspected by SEOs, but getting this official confirmation is a substantive step forward.
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Another reason to Upgrade to the latest Internet Explorer or use another browser.
Quoted from Facebook Blog:
Since its launch two years ago, Chat has grown from a small feature into one of the most widely used tools on Facebook. People around the world use it to share quick updates with people nearby and to stay in touch over long distances with friends and loved ones. And the more that people chat, the more we need to do to keep the application running smoothly.
We know you want Chat to be hassle-free and uninterrupted. In the coming weeks, we will be making important improvements in the way connections are established and messages are sent, so that Chat will be much more stable for you and your friends.
The biggest improvements come from changes that aren’t supported on older web browsers. After evaluating the alternatives, we’ve decided to make rapid improvements and provide the best Chat experience possible, which means we will no longer support Internet Explorer 6 browsers.
You got until Sept. 15, 2010, if you want to continue using features like Facebook Chat you need to Upgrade to the Latest Internet Explorer or choose another browser.
Your choices are Chrome, Firefox or Opera. All these browsers work well with Facebook and all these browsers will get substantial updates and different looks over the next few months.