Clipboard- I hate having to lose what I cut,copy / paste when I go between files or images. So , my suggestion is a clipboard. It collects items so that you can later paste what you want in between image in rockpaint or the text editor.
- Also, maybe a new screendump option that lets you take many images of what you are doing on rockbox. You could later take these images and make an anmiated gif & it would be like you took a video of what you did.