It's kind of difficult to explain Twitter. If you use Facebook regularly, Twitter is like the Status Update. I can post a brief, quick update about myself, Free Geek, or anything I want to from almost anywhere. I figured out how to Twitter from my Pidgin instant messenger, and from my phone.
My Twitter feed on the blog will remain at the top right of the page -next to the latest blog entry. So, visit my blog frequently to see what new Linux adventure I'm having, what the dogs are doing, and the age old twitter question, "What am I doing now?"