Twitter is the thing to do. And if you don't know what it is, then you need to find out. Even my CEO does it.
Wikipedia says it "is a free social networking and micro-blogging service that allows users to send "updates" (or "tweets"; text-based posts, up to 140 characters long) to the Twitter website, via short message service (e.g. on a cell phone), instant messaging, or a third-party application such as Twitterrific or Facebook."
You can follow me here.
Tweet on, twitterers!