With the KDE 4 branch in development, there is a lot of buzz over usability lately.
Using the current "logout" fading effect, I've created an intelligent way of informing users about security/system notifications of importance.
This is just an idea, but I feel that people are still ignoring important icons or notificatioins important for keeping your system up-to-date and secure.
If you would like to read my full idea and write-up about this, including screen shots, please visit my website or go straight to the article:
Peace. Love. KDE Everywhere! :)