TheAppleBlog has an interesting item up about Notational Velocity, a note-taking application for the Mac. "Years ago — even before Getting Things Done was all the rage — a powerful note-taking application named Notational Velocity, was," says the post. "And then it lay nearly dormant." The application is open source now, and its developers say it "scrapes away the tartar of convention that handicaps" information retrieval. "Notational Velocity captures your notes in a way that’s so simple, you really need to try it out to grasp its brilliance," adds TheAppleBlog. That's a lot of superlatives. Check out the new features in the updated version of Notational Velocity here. Also check out Lisa's post on the Tomboy note-taking application.