This morning I came across yet another online utility for Twitter called TwitThis. It's the equivalent of the Digg and Reddit buttons we have below our posts, and allows users (like you) to bookmark things you like and share them with other Twitter users. It also turns Twitter into a social-bookmarking service, letting you share links with other Twitter users in real time.
The system uses TinyURL, a URL shortening service, to tighten up ungainly lengths so they'll fit within Twitter's stringent 140-character limit. They also provide a bookmarklet, and a plugin for WordPress users to add the button to every post.
If you're wondering what Twitter is, check out our detailed newbie's guide. I've added the TwitThis button below.