In addition to the application icons, there are several other items in the task panel.

The packages aren't always represented by a proper application icon.

Dragging a file onto a docked application icon and holding it there for a bit produces the same result.

That's thanks to another welcome addition: the ability to minimize windows "into" the application icon.

Any icon in Window Maker, including application icons, can be easily changed.

Can anyone point out where the application icons and freaking window buttons are?

They can also create multiple pages for the application icons.

Finally, application icons in the Dock now "jump" when they want your attention.

Shift + Right-click on an application icon allows a process to be started as a different user.

Assuming it's not a permanent resident, the application icon will disappear from the Dock.