So Facebook gets Friendfeed. A big social media sites get what is essentially a social media aggregator, ensuring of course they have more social media aggregation.
At this rate there are an insane amount of social media sites out there (just take alook at a few of them at http://knowem.com/). There are many more sites that aggregate some of their information in feeds, gizmos, etc.
To lay it out blatantly, social media aggregation and integration is going to be the new norm. Social media became a norm, and it also became so incredibly widespread it's hard to track which service you're using.