Adding shortcuts to the taskbar is very nice. What would make it better is if a person could 'double-click' them to get them to open. At the moment, I am not able to do this on the shortcuts here. So I have to use control+click. Also, I haven't found an easy way to rearrange them. I just started using Aland's Synopsis, so I added a shortcut to it (the green shortcut). If I wanted it on the left end of that row, though, the only way I know to get that done is to delete all the shortcuts before that one and then add them back. A drag and drop feature would be nice here.

Also, what would REALLY make the taskbar useful would be to make it somewhat similar to the toolbar of the Finder window. In the finder window, you can add 'space', 'flexible space' and 'separator' to the toolbar to help organize the apps you're putting there.

Having this ability would allow a user to better organize shortcuts and resources. For instance, a person could keep their English Bibles, the frequent Greek Bibles and tools, and their Hebrew resources all separate. Many of the covers look the same, and if there are a lot of them on the taskbar, a person has to hover over them and wait for the box to appear with resource name or remember which order they were placed in. Here is an example of what this might look like if a person could organize like this.

This way a person doesn't have to have their resources mixed up or have shortcut commands mixed with them (notice the 'close all' on the right, and with a separator bar too). I have no idea how much work this would be, and I will still REALLY enjoy using L4 even if I never see this implemented. But it would be nice.
Thanks for all the hard work.