Laura Shoe's site, Digital Daily Dose, is a Wordpress blog. Laura is an instructor and photographer from Seattle, WA. There are some interesting Lightroom tutorials. Recent topics include classic film borders and vignettes, the Clarity slider, and do you need Photoshop (if you already have Lightroom).
Since it's a Wordpress blog site, it comes with interactive Web 2.0 features like comments, tagging, and permalinks.