One is just something that I just noticed is missing. On the main toolbar, there's a faint border around the preview of the actively selected window. That's missing from the secondary toolbar.

The second thing is a feature request. I'd like to be able to click on a grouped taskbar button and have it cycle through the windows. It's a feature that some apps enable in the main toolbar. The previews still appear if you hover over the icon, but clicking on it will start cycling through the different windows. If one of the windows in the group is currently selected, it will give focus to the next one. It's incredibly useful if you want to pop through a bunch of windows.

The change of the left click function is a registry tweak. I dont know if off the top of my head, but it was one of the first changes I made when I loaded windows 7.

This program can change the registry setting for you:
http://www.intowindows.com/tweak-windows-7-taskbar-with-7-taskbar-tweaker/

Ah, I found it. Here is the registry change needed in order to click on a stack of programs and cycle through them:



Hope this helps.

It seems like the registry edit will only bring up the last window you had selected. The behavior I was hoping for is something I have enabled through Bins. It's under the option "Clicking taskbar icon cycles through open windows."

No, The registry edit makes your windows cycle. See the video I attached for proof. If you have 5 IE tabs or 5 explorer windows and you click on the stacked super taskbar button for those windows, it will cycle through all of them with this registry edit.