I must confess that I have been tweeting less and viewing both Facebook and Twitter considerably less as well.  I am not sure quite why that is, but I think I hit a point with Twitter, at least, where it became hard to pay attention to what my friends were saying on Twitter. 

However, Twitter finally released a beta version of their Lists feature.  After setting up a few of them, I find my Twitter feed much more manageable.  Good going, Twitter!