Atop the blog's right column, "Made with LR3" features a single photo that was made better thanks to Lightroom 3. The photo changes frequently and shows how I used a particular tool in Lightroom. It's a quick tip, a snapshot of a tool rather than a detailed walk-through.
At the moment, it highlights the Post-Crop Vignetting tool, which is much improved in LR3. You also can click the thumbnail to reach a mini-gallery of previous "Made with LR3" photos. Enjoy.