http://lsub.org/who/nemo/iepanels.swf
This is how panels are going to be handled in i.e. The thing I used to make the screencast generates .swf, but I think that'll be ok for most people. Text panels with fonts and inlined images are done but not yet integrated with the rest, the boxes you see in the video are just "debug panels" only useful for the obvious purpose. Also, I don't know why, but the screencast didn't take all the pixels and there are some pixels shown that did not have that color on my screen; don't ask me why. enjoy