What is Twitter really good for? After the latest wave of media-fueled adoption, will we have some lasting, essential and unique implementations of Twitter feeds? Really, what can Twitter do that other communications systems can't?

One absolute slam dunk use of Twitter is for businesses that feature a daily specialty to communicate their flavor of the day via tweet. A prime example is, of course, woot.com's 250,000+ follower Twitter feed. Woot.com sells only one item each day, everyday, and following the service through woot seems to be an efficient method to keep up with the daily offer. Berkeley's Cheeseboard collective offers a single type of Pizza each day, and iSchool alum Kevin Lim has created a robotic Twitter feed that scrapes the collective's website and posts the results to Twitter. Why doesn't Cheeseboard take the time to provide its own tweets? Another potential business that could benefit from Twitter is Berkeley's own Yogurt Park. In seconds, using a cell phone, Yogurt Park could tweet its ever-changing list of yogurt flavors to Twitter. Not only would customers be happy to know what options are available to them, but simply being reminded each day, everyday, that the service exists would be great advertising for a small business.