Evangelism and Marketing guru Guy Kawasaki has posted a 10-points explanation on how to use Twitter for business. That's "Twitter for Dummies", if you wish: a must read for all of you don't have a Twitter account yet.
I often wrote here and there that I wished we Agilent Musketeers had such a tool at our disposal when we were developing our flagship product: there is no better way to reach and keep in touch with the end-users.
That's why I as many other folks out there are putting Twitter at the center of (product) marketing strategies, whatever "marketing" means for you.