Having just seen the news that 2.2 is coming soon, I thought I'd throw one little suggestion in - hopefully it's not too late...
Can you please make the upload section (on the write post/page page) be collapsable, just like all the other larger sections below it (turn it into a dbx-b-ox). It looks to me like all you'd have to do is wrap the iframe in a div and move it down into the dbx-group div.
The reason is that I never use the upload feature, and so I want to be able to collapse it and move it down the list so I can easily access some other boxes that I do use that are below it.
I've tweaked my own code to do this, but it's an innocuous little fix, and I'd love to not have to worry about it every time I update WP.
Keep up the great work!