A small script that will install a trackbar filter which only shows the keys belonging to the currently selected modifier on the stack. So if you have 10 animated modifiers on your stack, you can now easily edit the keys for just one of them without opening the curve editor.
Run the script to create the filter (put script in /scripts/startup/ folder to make it stick)
To activate: rightclick on trackbar -> filter -> modFilter.
Enjoy!