Jarad,
I have called for the provision of an action on open tiddler, ideally the ability to do so on a per tiddler basis.
However an effective work around for now is to have a button in the tiddler, which once pressed will do as you ask, I know this is not what you are after but to be honest perhaps it is better the user gets a chance to choose what happens before a lot of tiddlers are opened.
The Button can contain a list widget with a filter which wrapps actionWidgets such as open tiddler. A form of batch button.
Let me know if you require more detail.
Regard
Tony