I don't hear this talked about much, but it is a really big deal for me. I have a ton of PNG files, as they really are the best format for linework scans; good compression but lossless, no license fee issues like with GIF and LZW TIFF, and generally universal with the exception of Revit.
It seems like this is something that could be added without much fear of breaking other things. Anyone have any insight as to why it hasn't been done, and if it might be on the agenda?