I think of Twitter as a mash up of instant messaging, IRC, and the web. It's a great tool for keeping abreast of the global technical sphere and a great place to connect with people from your local community. The flexibility of Twitter, it's growing user base, and it's APIs are probably what has accelerated its use.

A couple neat examples of the flexibility of Twitter that I've seen are:

• Mo Kahn using Jott to transcribe his phone messages to twitter text
• A sensor for your house plants that broadcast their water health
• A Continuous Integration server module that notifies the software development teams of a failed build

What innovative uses of Twitter have you seen or do you use?