excellent article on Lightroom
An absolutely excellent article about the beta release of Adobe Lightroom (check out the beta - download from http://labs.macromedia.com/technologies/lightroom/).
Article: http://www.luminous-landscape.com/reviews/software/lightroom1.shtml
This article introduces a bit of history and background about photo editing software, RAW images, useful links, and - most importantly -offers a very detailed how-to for Lightroom (with screenshots). If you just downloaded the beta and you want to learn more about Lightroom, or just want to learn more about editing photos, this article is highly recommended.