I did both of the excersizes. I commented in 5 colleague's blogs so that Jan Marie can count my posts. LOL. I also started a Google Reader. Actually, I already had one but it had an ESPN site attached. I added 3 new teaching related blogs. I think that building a PLN can be very useful for those that want to participate. I do think it depends a lot upon one's level of interest and involvement. I think it also will depend a lot upon what we do in our personal lives. Some teachers see their personal life as time spent away from their professional life while others are willing to integrate them. Some like to play on the computer and others shy away from them. These things will come into play. However, I think with the future of technology as it is integrated into education, it will be incumbant upon us all to embrace it to some degree. This will allow us to grow as educators and use information that is readily at hand in a much swifter manner.
This site has a list of 40 good Special Education blogs. I think it is as good as any other place to start gleaning information.