Hey, Irene!
Everybody matters! I'm glad you're reaching out and networking with people beyond your local institution.
I'm an adjunct instructor of Child Development for a community college and I'm the only man in our small department. I sometimes feel marginalized, like some kind of outsider. I don't know that there's an awkward gender dynamic (although that's what I suspect), or whatever other social factors may be at work. I'm a bit of an introvert, so my often reserved demeanor may also be involved.
But recently, I'm finding great satisfaction and rejuvenation by forging relationships outside of the college. We're talking about Communities of Practice today (and/or Communities of Interest, as Leanne clarified). I'm connecting with new people and learning about online course design and open education. I've never done any blogging--but I'm inspired by yours! I might even venture into blogging as another tool for teaching.
Just as one new friend to another--I agree with Jenni. Don't call yourself a "lurker"--that sounds too creepy and voyeuristic! It's also somewhat diminishing--as if your contributions are superfluous or irrelevant. At the very least, you're an observer; and even more, you're a colleague! You're posting a blog, which certainly promotes our conversation.
Irene's Life Matters!