Is there a way to add keyboard shortcuts to preference panes?
You can create an Automator based service that opens the specific preference pane.

You can find the preference pane bundles in the Library/PreferencePanes set of folders:


/System/Library/PreferencePanes
/Library/PreferencePanes
~/Library/PreferencePanes


Preference panes are special bundles that when opened from the Finder, will launch System Preferences.app and automatically switch to their settings.


Create an Automator Service
Drag the desired preference pane onto the Automator workflow
Add the Open Finder Items action…
…and select System Preferences.app in the action
Add a Watch Me Do action to record any clicks and interactions with the panel


To assign this workflow as a keyboard shortcut, see this Tuts+ tutorial, How to Launch Any App with a Keyboard Shortcut.