From tucows today:
Enable an advanced edit mode in iPhoto 6
Posted May 20th 2006 11:00AM by David Chartier
Filed under: iLife, Software, Cool tools

Rob Griffiths at Macworld has stumbled upon an advanced edit mode in iPhoto 6 that offers some advanced functions when using the Retouch or Red-Eye tools. When using either of these tools, you can hit ctrl-caps lock-9 (yes, I said caps lock) to switch on these specialized cursors that allow you to fine-tune the affected areas and intensities that will be applied to your image.

Check out the Macworld article for the full run-down on how these tools work and how you can customize them, as well as an example of their abilities. Here's the Macworld link
<http://www.macworld.com/weblogs/macosxhints/2006/05/ip6edit/index.php?lsrc=mwrss>