Too much?

I am wondering how much is too much in regards to technology and communication.  Sometimes I feel like I have trouble keeping up with everything, and I definitely don't want to put my parents on overload, but I want to make sure that I am providing them with as much open communication as possible.  Currently I have a blog which I update regularly, and I send out emails at least twice a week.  Recently I have developed a classroom Facebook page so that parents can easily stay updated.  As I am typing this I am wondering if it is overkill or if parents are happy to see the updates through all of the sources.  Perhaps it is time to conduct a survey regarding the preferred use of communication and the frequency of updates...