Can Tasker launch an app's shortcut as an action? I can't find "Shortcuts" as an option in the "Select Action Category"-dialog when creating a new task. This works without problems in Locale.
Strangely, this does not appear to be possible in Tasker, by default. However, I see there is the AutoShortcut app on Google Play which is meant to allow it. Interestingly, Tasker itself will tell you about AutoShortcut (complete with a link to Google Play) if you press the magnifying glass icon when attempting to add a plugin action to a task (I'll update this answer with screen shots when I get around to it).
Theoretically, it should also be possible using the
Send Intent action, but that seems way more complicated than should be necessary for such a simple task. If AutoShortcut doesn't work for you, let me know, and I can try to figure out what the Intent settings should be.
My advice would be to switch to Automagic. What you're asking is a simple matter of selecting the "class" option in "Launch App." It gives you a complete list of available "shortcuts" to launch. Automagic has 90% of the functionality of Tasker, and requires fewer plugins. However, it will also use all the plugins Tasker can use. Also, the interface is a hundred times easier to learn.