I am thrilled to use the mass action to create participant assignments. But we really NEED to be able to add individual attributes this way.
Our issue:
We want to assign 200 people to a particular newsletter. (We track who subscribes to what newsletter through attributes). It is a pain to go to each of those profiles and add the attribute manually.
We even discussed doing this as a "participant assignment" but decided against it because we'd have to have an activity setup, and its not really an activity.
Anyway -- mass action for attributes please!