I know a few here use Lightroom, so I thought you might be interested in the Lightroom eSeminar Adobe ran a couple of days ago:
https://eseminars.adobeconnect.com/_...&pbMode=normal
Food photographer and Adobe Lightroom certified expert, Debbie Jones runs through some of the basics of Lightroom as well as tips and tricks and the workflow that she uses in her work. It's an hour long so you might want to get yourself comfortable before you begin watching :-)
Cheers
Nick
Edit: I've just found a page with a lot of Adobe's eSeminars, including Lightroom, PhotoShop CS5 and PhotoShop Elements 9/10.
http://www.adobe.com/uk/events/presentations.html#1