I would also like a report to track who marked the task completed. I want to know when someone else completed a task other than the person assigned to the task.
I am also having this issue. The attachments do NOT get attached to the task created via the Outlook Plug In. I tried both the Preview pane and with the emailed fully opened.
I am also interested on when this might be available to use. I would love to have a workflow that automatically moved tasks to different projects once the status is changed.