What's "twitter"?

[DMiller]

That is it. Like I said, though, it's pretty good for building a professional network. A friend of mine at Microsoft who I followed on Twitter got into a discussion with one of his other friends on Twitter about AP Computer Science and I started following the friend since he had a lot of good tips about CS and was trying to build his own network of teachers using technology. It's much more of a network than a blog.