Google Docs, GMail and some other mail clients have started allowing users to copy images from a desktop program (paint / powerpoint / word / gimp / fireworks etc...) and paste them directly into the text editor without having to manually save the file and upload it. The same feature would be really useful in moodle.
User copies an image into their clipboard
User writes some text into the text editor (e.g. label / web page) in moodle and presses Ctrl + V to paste the image.
The image should upload to the personal files area and be inserted into the text editor.