Since this is more of an actual discussion about using technology in the classroom, plan for it just as you would other class discussions. However, there is still one important point to keep in mind. Try to fit the discussion into a logical place in your syllabus. It might work best if this is done early in the semester, perhaps after they've published their first papers or you've had a chance to assign the first online discussion. That way they might also be better able to think of ways the technology helped, hindered, or otherwise changed their approach to writing. You could also have this discussion later in the semester, perhaps to re-emphasize the importance of context in the production of texts.