Bulk opening of several node edit screens is there a way to open up several nodes to edit at once? At /admin/content I can mark all of the nodes that I want to edit, but I still have to click each edit link individually.

Is this something that I could do by adding an action to the "Update Options" dropdown?

Edit
The reason for the mass editing is that I have added a new field to a content type. I would like to add unique values to that field for preexisting nodes.
As far as I am aware, no module will do this out of the box. However in saying that there is a potential solution in:


Installing Views Bulk Operations (VBO)
Writing a custom action that happens on each selected node


From the VBO page:

How can I write an action that performs a function on all selected nodes AT ONCE?

You need to write a node operation instead of an action. Whereas actions get called once for every selected node, node operations are called once only, and they are passed an array of selected nodes. Check out sirkitree's article for the same concept applied to user operations.
Note: If you use Batch API to execute your actions, VBO will revert to calling the action once per node instead. This is because it doesn't make sense to batch one single action.