Too Much Communication

I typically spend 2-3 hours each week blogging, and maybe another hour replying to comments.  I also spend 1-2 hours reading tweets, Facebook updates, blog posts, etc.  That's on top of the two hours or so I spend emailing.

So I spend around 6 or 7 hours each week on electronic communications.  That's a much greater time investment than I thought I was making, but I know people that spend much more time than that.

How much time do you spend on social media in a given week?  A couple hours?  A few?  Several?  At what point is it too much communication?