Google Classifies Subdomains As Part Of The Main Domain Now

The Google Webmaster Blog announced a significantly large change to how Google Webmaster Tools classifies subdomains.
Prior, subdomains would be considered separate sites and thus a link from a subdomain would be considered an external link by Google, in Google's reports. Today, Google is changing that and now considering those links internal links.
So when I link from forums.seroundtable.com to www.seroundtable.com, that is no longer a link from an external domain, it is a link from an internal domain.

Expanded "Like" Button Functionality

According to the WSJ report, "Facebook is also working on expanding its 'Like' button to include other gestures that marketers and third-party developers can create, said these people. Consumers could share information about the products they want to buy or the places they want to go, for instance."

Should Facebook add an unfiltered version of the News Feed?

Google and Facebook aren't the only two companies filtering our content this way. Many services do this kind of personalization. Just this week, AOL launched a new iPad Magazine, which is based on serving personalized content for each user. Google and Facebook are two of the most dominant sources of information, however. While Google hopes to play a bigger role in how we see information from our friends, brands, and those we're influenced by on the social level, that role currently belongs to Facebook as the world's dominant social network. It's how the majority of social Internet users engage with content this way.