Upon seeing a neat window management concept for GNOME 3.0 on Reddit (although it has some big criticisms in the comments), i was reminded of an amazing scrollbar concept i saw a while ago. Since Karmic will be able to test GNOME 3.0, i think these intuitive scrollbars would be a great addition.
From Archive.org http://www.archive.org/details/popup_scrollbar
Also on YouTube: http://www.youtube.com/watch?v=-PnXY4wjuH8
This would just give Ubuntu more edge over Windows and Mac, making Ubuntu even more intuitive. Although for people used to the old style scrollbar it may be intimidating at first glance, within a couple of clicks, it would immedately become another reason to get hooked on Ubuntu!
Launchpad Bug: https://bugs.launchpad.net/bugs/253546
GTK Feature Request: http://bugzilla.gnome.org/show_bug.cgi?id=530413
