In an earlier “Technology Today” column I wrote about the benefits of using newsreaders to stay abreast of multiple blogs. I pointed out that newsreaders — my current favorite of which is Google Reader — allow you to build “channels” of information so that you can control what kinds of information you receive and when you read it.

A newer information-exchange tool that has received a lot of press recently is Twitter. This free Internet-based service will broadcast whatever you have to say to whoever decides to receive your messages, and will allow you to receive and view similar messages from other Twitter users. The catch: each message can be no more than 140 characters long, the standard length of a cell phone text message.