Today, almost everyone is active on multiple social networks and displaying social streams is a widely-implemented when creating websites.
jQuery Socialist is a plugin which can aggregate activity from multiple networks and display it as a single feed.
It can get the contents from Facebook pages, Twitter, LinkedIn, YouTube, RSS and many others with ease.
The plugin can present the combined stream as a Pinterest-like responsive layout or any other custom one you can design (multiple ready-to-use themes exist).
P.S. A WordPress plugin for Socialist is also under development.