When I grade forum posts I generally respond to their post as well. I would like to be able to set their grade and post a response at the same time. Ie. for the post response button to send the grade information too.
I know it is only an extra click but clicks can take up to 20 seconds where I am and when one has 50 students to mark, that is er, about 15 minutes. Also, if one has to use two clicks then one is more likely to forget to grade.
I use the response to see who I have graded.