I'm a newbie twit, I must admit (obvious from my post signature). and I did feel a twit when I tweeted for the first time - and said as much too!
I now use it as a reference pool for all my articles, which are published on several sites. It saves readers from randomly scouting around for them or not finding out about them at all. They just click on my Twitter link seated below my signature to find them. It's also good for instant messaging to my followers and to gain new contacts to enhance visibility.
I can see it's potential.
On the downside, it doesn't allow you to elaborate on anything - the whole point of it, I suppose. If you want to display some personality or put up some information about private matters, e.g, I had a nice weekend and so on...it could quickly degenerate into a honeypot for irrelevant followers and it can muddy your business profile too by making your business look more like a hobby. That's not good.
ps. I had a boiled egg for breakfast