Recently I extended supplyJS to support streaming images. (This actually was implemented all the time, I just added the listener for the MIME types)
I'd be more than happy to get some responses from you guys. If you're in the mood, please post your Browser / version / performance to the comments!
! Important !
To make this work, I'm using base64 encoded images. The Internet Explorer does not handle base64 encoded images that well, so it might not work (properly)