Adobe Lightroom videocasts

Since getting my iPod Touch for Christmas I've been investigating some of the Lightroom tutorial videocasts. I've had a copy of The Adobe Photoshop Lightroom Book: The Complete Guide for Photographers but still haven't had a lot of time to sit down and read through it.

These are the podcasts I've been watching:

Adobe Photoshop Lightroom with George Jadine - tutorials are interspersed with interviews and portfolio reviews, but the tutorials are of a very high standard and are very informative although mostly focussed on the develop module
Adobe Photoshop Lightroom Killer Tips - mostly short videos giving hints and tips
Lightroom for digital photographers with Michael Rather. This is a regularly updated podcast covering a wide range of subjects