I follow the Dell Outlet store on Twitter, and I've noticed that Dell uses the service prudently. Rather than bombard its followers with endless tweets, it posts sparingly. For instance, there was one Dell Outlet post yesterday (June 11) and one today thus far. It's smart of Dell not to over-tweet--unlike some businesses that I've followed in the past but have since abandoned.

There's also the question of whether corporations will find success on Twitter if they all copy Dell's formula. For instance, if I'm following 10 businesses, do I really want to get numerous product pitches every day? That's like opening the mailbox and sifting through stacks of junk mail.

Certainly Twitter can benefit from money-generating corporate accounts. But it will have to prevent its users from being spammed to death.