Chairman Dave explained the concept of working on the "Camera Raw" image than the pre-processed "JPEG". Lightroom works by amending the image without altering the image information.
Dave had planned the overview to show a process of taking an image and importing it into Lightroom to start the post processing through to printing and image display on the web.
Two images were utilised to show how to operate the "Library" and "Develop" portion of the application. The talk was uncomplicated and easy to follow, it was specifically not a workshop as a specific course would be a better option but this overview enabled the attentive listeners to understand and have the confidence to move into the deeper and higher quality processing of their images.
For more help
Download a PDF on using Lightroom Using Lightroom 3
Check out Adobe's help forum http://forums.adobe.com/community/lightroom
Lightroom Youtube Channel http://www.youtube.com/user/AdobeLightroom