Feature request: Enable background / asynchronous uploading

I believe that uploading in the background on websites is quite possible nowadays, this would be a very useful feature, and it would be good if plugins could make use of it too. For example it would be great if I could start uploading a number of image files into my Nextgen Gallery, and be able to continue navigating around my admin area or my frontend without interrupting the upload process.

I guess that it would be necessary for navigation around the page to be done with ajax, I guess a url location change would interrupt any kind of upload no matter what?