I havn't heard much about Slicker yet, and Kicker is still the moste important "application" for me.
I want to show you my Kicker configuration and how it could be improved to support my needs.
I like to have all vertical space so I placed a collection of kicker panels on my right desktop side.
I had to separate it into 4 Panels:
on the top right side: a 100 Pixel wide panel with 30% height. It contains the Main Menu Icon, the clock (analog and digital) and the system tray.
on the bottom right side: a 100 pixel wide panel with 30% height. It contains the task/window bar and system monitor
in the middle middle right side: two 50 pixel wide panels with 40% height. It contains icons and sub menues.
Because of positioning limits of Kicker I can't give the upper and lower part different heights :(