I think being an active participant in an online community is highly beneficial! I spend hours looking at fellow teacher blogs every week. I gain such wonderful insights and relate my experiences with the ones that are described in various blogs. I particularly like that some blogs are grade specific.
I have just recently started to comment on blogs. When I first discovered the world of blogs, I was timid to do so, but have since learned that reflecting along with others is worth the "pain." I compare commenting conversations to having a team meeting with my grade level...but with individuals that I don't necessarily know. I am beginning to feel more comfortable sharing my thoughts with others. I am continuing to learn how to make my comments meaningful and specific as I offer up examples, anecdotes, and/or resources that others can utilize. I love when blogs have videos integrated in them - this is something I am going to work on this year! I love videos because they provided specific examples of what is being discussed in a real scenario.
Two of my favorite blogs right now are http://www.seusstastic.blogspot.com and http://www.wereadweblogweteach.com.
These blogs have focused on a Daily 5 and Cafe book study since the beginning of July. I am going to be undertaking Daily 5 in my literacy routines this year, so I have found that these studies and blogs are very resourceful as I start my journey.