Advertising Communities Picasa Social Networking 
Mindjumpers
JUNE 28, 2010
You can choose and customize between different layouts can be incorporated with other Google services like Feedburner, Picasa etc. In that way it is more or less easy to connect with other bloggers on the Tumblr platform, but it can also be a downside that it is a closed community with no external comment options.
Techipedia: Tamar Weinberg
APRIL 10, 2008
Founded by four ex-Googlers, FriendFeed allows you to subscribe to your friends’ updates across 35 social networks and to stay up to date with the content they’re discovering and sharing across the web. In social media spheres, it’s almost unavoidable to not engage online with content in some way.
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