Looks like the official release date for OS X Leopard is next Friday (October 26th), and Apple has published the list of 300+ new features available in this release. One interesting feature that caught my eye is the “Help Menu search” described as:

Enjoy more helpful Help. A new search field in the Help menu displays all relevant menu items in the active application. Highlight one and Leopard opens the menu and highlights the command.

And here is the official screenshot thumbnail that shows it in action:

Here is an unofficial screenshot of the same feature (taken from this page):

I’m not sure if it’s patented, and if it is, i hope that i don’t get sued for infringing on it :)