When I copy something to the clipboard, I would like the bitmap image data to be in PNG format rather than TIFF format, so when I paste inline into an email, the image shows up when someone reads the email in a browser. Don't even know if this is possible, so another solution would be to use Napkin's pip system: http://a3.mzstatic.com/us/r30/Purple/v4/e9/95/88/e99588bd-70bf-f2d4-cc2c-7e05a48820ba/screen800x500.jpeg
sorry for the delay. Due to some reason this post awaited moderation ... If I remember correctly we had png on the clipboard, but this did not work with Microsoft Office :O I will search our bug tracker. Apart from this I don't see a reason why we could not use PNG instead of TIFF.
I'd hate to see computing held back by Microsoft any more than it already has been!