A common complaint amongst Users is that the "conversation" that takes place in a workflow such as Votes and Comments is "buried". I can find it, but I do sympathize as the Process Status is grouped with other display information that the everyday User doesn't care about (like the running process instance).
The idea is to leverage the Discussions Forum for Change Objects to capture and display the workflow "conversation". I see Antonio Villanueva has accomplished this via Expression Robots (see WF Expression to auto create discussion topics and postings), but the API's to my knowledge are not public or supported for customization. At the very least it would be great if these API's could become public/supported. If this functionality were to get baked into the OOTB functionality then it probably needs a Preference to turn it on/off because not everyone is going to want it.
For those that are trying to get Users to leverage the Discussions and reduce the use of e-mail (which inevitably results in the loss of important information) having the (Change Object) Discussion as the easily accessible location for the workflow conversation would support adoption.