I created a Tweeter account for our online payment gateway, Mozcom PayEasy. The site can be accessed at http://tweeter.com/MozcomPayEasy. My first Tweeter username choice was actually just plain 'PayEasy'. But it looks like somebody beat me to it. And whatever that person did seem to be not so nice because Tweeter shows a message that the account has been blocked. Probably somebody doing a financial-related scam.
Just as Google seems to like indexing blogs, it also actively indexes Tweeter contents. So for those who are interested in search engine optimization, extending one's website to Tweeter seem to help in getting found. I made a couple of initial entries onto my Tweeter account, and within the hour, I started getting Google Alerts on PayEasy's Tweeter entries.
I also created a Twitter account for Picatoo at http://tweeter.com/Picatoo.