8 Types of People Who Belong on Twitter
The Customer Support Rep
Very similar to the Brand Watchdog, this too is focused on watching for and responding to customer service questions. This category is usually filled by the unsung Twitter heroes (Twiroes?). They are likely handling questions in other (non-Twitter) venues and have added Twitter to the ways they communicate. The catch here is that some Twitter customer service reps will actually help you resolve your issue. We'll see how long that lasts!