I gave a talk at SCALE 9x on plugin support in sudo 1.8. The slides from the presentation are available.
Alek Komarnitsky has a nice slide show on how to use sudo in a large, heterogeneous environment.
A.P. Lawrence has a nice article that covers the sudo basics entitled Using Sudo.
polishlinux.com has a short Sudo FAQ in the Root account section of their Installing software in GNU/Linux document.