G5man provides information on advanced spring-loaded folder operation, which is expected to make an appearance during the WWDC keynote presentation.

"One valid criticism of OS 9 spring-loaded folders is that they present moving targets that can be confusing to novices and distracting to experienced users. Apple is implementing a more elegant user-proposed solution that will be demoed during Steve Jobs keynote at WWDC on May 6, 2002. The enclosed screenshot shows a contextual-menu driven method using multi-column windows that already exist in OS X.

In this particular screenshot the PDF file name 'memo' is dragged from the desktop onto the Finder icon in the dock (while holding the option key to make a copy). At point of contact a multi-column contextual window appears showing the contents of the first column (toolbar icons also show in the first column to shorten the dragging distance and circumvent inadvertent icon displacement). The next drag takes place on top of the 'Documents-G4' drive icon which then reveals its contents in the second column (and so on, so forth). When the mouse button is released (or clicked) on top of the 'Hemisphere International' folder, the copy process initiates and the contextual window disappears.

Also note that when a triangle in the dock is colored green it indicates that the application is foremost. Green-colored triangles in a window indicates that a folder has file contents (gray means the folder is empty)."

To quote myself from earlier threads;

""Dragging and dropping" to the dock using a spring loaded dock icon."

Oh well, I can't find the others where I begged for this kinf od thing. What's my point? If it's real, then I am damn excited!

I'm wondering now if the dock it the only place this feature is active. I mean, in OS X, it would also be nice to see it work with the toolbar, and in regular column view. Only time will tell i guess.

If you were to look at the windows on OS 8.0 or later as you used the SLF function, you would notice that that they have the close and shrink boxes too. You can't use them while dragging a file, but they are there. So, the fact that all of the window buttons present in the image does not indicate that this is a hoax. It is simply that those buttons are present in any open window.