A further enhancement I'd like to see is the ability to post a comment at the same time as assigning a task to someone. This would reduce the amount of email being generated by OpenGoo and make it a lot more usable.
Currently, if I add a comment then reassign a task (a common event in our workflows), it will generate two emails, one for the comment and one for the reassignment.
It would be better if you could add a comment at the same time as reassigning the task. The comment could be circulated to all subscribers as normal, and the assignee could receive an email that says something like "Bob assigned this task to you and made this comment".