In case you did not get a chance to explore the available resources elsewhere, here is a short list that will give you a kick-start with the new release of Lightroom.
Kelby | TV offers many interesting photo related programming
Lightroom 3 Training Center from the knowledgeable guys as NAPP
Julieanne Kost on Lightroom also check out her other programs
Lightroom Killer Tips by Mat Klowskowski
Learning Lightroom, various resources provided by Adobe
In addition to plenty of information on Lightroom, you will also find information on Photoshop and other Adobe products at most of the Web sites above.