I didn't notice this in the list on page 1, so I'll say it now: I was watching some ESB last night and one thing that might be fun to do is, after R2 fixes the hyperdrive and falls down the hole, make him fall faster/more smoothly?
As it is, when he first starts falling into the hole, it almost looks like he slows down for a second, like his feet are grasping something (or he's landing on a mat), then he falls out of sight. If he just rolled back and went straight down out of sight, I think that would be funny. :)