Once you move into that level of Twitter, you will begin to think about how to advertise and grow your Twitter account. While you can always post an RSS feed of your account or install a widget, people don't necessarily take the time to read your recent posts. In fact, most posts aren't really attractive or well thought-out, so they won't draw in many of your site's visitors.
TwitterCounter. Similar to other counters such as hit counters and FeedBurner's Feedcounter, TwitterCounter is a chicklet for tracking the number of followers you have on Twitter. Here is what it looks like with my other chicklets on my sidebar: