Strobist have just started a virtual boot camp for anyone interested in improving their lighting skills:
The main point of SBC is to nudge those photographers out there who have not made the transition to actually trying this lighting stuff out to make the jump. Secondarily, we will hopefully all get a chance to see what many different photogs – from all around the world – do with the exact same assignments. You’ll also be able to ask "how’d you do that?" questions to your fellow photographers. Using Flickr, we will effectively become a virtual classroom.
Sign up and read the rules at Strobist