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LinkedIn is one of the premier social networks aiming to connect business professionals. The following videos are a glimpse into some of the new features of this great service. The first video is pretty usefull if you are looking to SEO your LinkedIn profile:

LinkedIn SEO tricks tutorial great must have seo tool

LinkedIn talks about OpenSocial

LinkedIn Next Gen Search Demo

I just changed my LinkedIn profile based on the tips from the first video and it works just fine