Tuning up is the bane of the mandolin player. I wish I had spelled bane correctly in the title. Thanks @voyagerfan5761 for the correction!

Poor service is the bain bane of our existence, yet we have the means to fix it. Email works, has proven laborious due to spam and other problems. Telephone hotlines are too immediate in some cases, and some things require research and a call back. Having used these, the agent often does not call back.
 
Twitter could be the most valuable customer satisfaction tool ever invented. GetSatisfaction.com isn't bad, but it's too laborious for the user. Twitter on the other hand could resolve a lot of problems with a simple trick. For one thing, the user is already registered. The 140-character limitation is a blessing. Once contact is made and an agent dispached, the rest can be handled via email. In cases that can quickly be solved, every return tweet giving the solution or confirming the resolution is like an advertisement showing how good the service is.
 
Using the Twitter API, build an (probably AIR) application that allows a single Twitter username to receive and log DM and Tweets, delivering them to one or more logged in agents, just like a call center. The agents can communicate on a back channel via Twitter, IRC or any IM. Every message sent and received is timestamped recorded in a database. An auto DM is sent to the [potential or current] customer after the first received message saying "we're on it" and the agent assigned figures out what to do and executes it.