You can get the basics at: <a href="http://drupal.org/theme-guide">http://drupal.org/theme-guide</a>, also search the web for Drupal Theming, you can find a lot of free blogs, posts, pod casts, screen casts, ect. <br><br>
One really great site is: <a href="http://mustardseedmedia.com/podcast">http://mustardseedmedia.com/podcast</a>, I just found out that Bob is back, and it is better than ever.<br><br>On the pay for stuff, there are a bunch of books like: <a href="http://www.amazon.com/Front-End-Drupal-Designing-Scripting/dp/0137136692/ref=sr_1_4?ie=UTF8&s=books&qid=1268714232&sr=8-4">Front
End Drupal: Designing, Theming, Scripting</a><br>But my favorite is: <a href="http://www.lynda.com">www.lynda.com</a>, they have 3 Drupal titles, the newest one being on Theming, <br><br>Hope that helps,<br>