I'm now about a month into my Twitter and Facebook hiatus. I find myself loading Google news quite a bit, but the good news there is that it actually updates much less frequently than Twitter and Facebook.
Overall, I continue to have conflicted feelings about those services. On the one hand, I get great, targeted updates about what's going on in the world in my areas of interest from Twitter, and because my friends live all over the world, Facebook is the best way to keep up with everyone. On the other hand, I feel like I have so much more mental space without all the chatter from those two services constantly filling my head.
I suspect this will end with me drastically culling my follow lists on both services and a return to using them. I may extend the hiatus, however, just to see how that goes.