Yes, we use it for three of our businesses- the Coffee Company and two cafes (all seperate twitters). I have found it to be a very effective and for sure a growing media for marketing the businesses. The twitter community, at least in indonesia, is pretty much always on their Blackberrys so posting a tweet gets an advertising message that is real time and relavant out fast and direct.
We are a specialty coffee catering company and use twitter all the time. We have probably done several thousand dollars in business through twitter and connected with some of our largest clients through the service. It is a huge part of what we do and we think - if used correctly - should be implemented by all!
We (Goshen Coffee in St. Louis) are really getting traction with the use of Twitter, too. What we have done is connected our web site (wordpress), facebook page and twitter account together. So, from our iPhone, using TweetDeck. We tweet and it publishes on our web site and Facebook Page. BRILLIANT.
This generates a daily presence of our brand and covers multiple mediums. We are not Tweeting our faces off. Last thing we want to do is piss off our fans with spamming them with non-sense. Maximum 3 per day.
The value of updating or web site with the tweets and FB posts creates relevance for the site. This means the more content added to your site on a regular basis, the more relevant it is to Search Engine Spiders. So, In short, better SEO.
Our customers who serve our coffee are Re-Tweeting or Tweeting giving us flat out props to their customers. Again, getting more reach. We reciprocate with their news involving our coffee. For instance, we just released a new blend for Pi Pizzeria. They did their own launch of it on twitter and included us every tweet. Win-Win.
Here are our three:
I am MYDARNDEST!