I'm curious to see how many of my readers are on twitter, and I invite to let us know and post your twitter screenname in the comments. I'm always on the lookout for writers to follow. And I'm curious what you use your twitter account for. Do you use it to promote your own posts? Tell people what you've had for breakfast? Connect with other writers?
If you're interested in getting more out of twitter, I urge you to think about why you choose to follow other accounts. I know I'll click that "follow" button if someone's twitter page consistently has funny observations about writing, consistently gives interesting links, or raises thought-provoking questions that I feel compelled to respond to. If you want more people to follow you, try offering some of these resources.
What else is twitter good for? Eventually, it might provide a record of what people were thinking about at a certain time. We could search the word "writing" and see what is being thought about writing at any one time. That, to me, is a fascinating idea. So while many people have come out strongly against twitter and how it's wrecking our attention spans, I don't mind it as long as its recognized for what it is - a useful tool for the sharing of information. It's not an art form, it's not going to replace the novel, and that's fine by me.