Check out the O'Reilly Radar report, Twitter and the Micro-Messaging Revolution: Communication, Connections, and Immediacy--140 Characters at a Time.
I quote from the report site:
This new O’Reilly Radar report reveals:
- Best practices for micro-messaging in business
- Pitfalls to avoid in this instant, very public medium
- New methods for customer service and quick market research
- How micro-messaging can help you reduce email and eliminate unproductive meetings