I am a major proponent of Twitter. It’s an amazing tool for staying on top of news, finding out where friends are and what interesting organizations are doing. It’s an amazing communications tool that allows tens, hundreds or thousands (depending on the number of followers) the ability to engage immediately.
That said, you have to be very careful about what you put out there. Check out this blog post about how someone recently “Tweeted” themselves out of a new job. You never know what types of Twitter searches have been set up and who your posts will reach.