"Find as you type" feature

I saw this over the internet, can't remember the exact location though. Just wanted to share it though.
When using browsers (Opera, Firefox, Konqueror), the feature "find as you type" is being enabled by pressing the "/" button. And then just typing searches for text in the content of the thing being opened.
I find it very useful; one thing that I preferred in GNOME over KDE in Linux was the GTK's built in "find as you type", which allows for searching content inside applications (nautilus, rhythmbox, etc all have it). Well, as Amarok uses something similar, and now I can see Konqueror has it, I'm really impressed with KDE.