Geat idea, and cool site... but what's with the JPEG images?! Haven't people learned by now to use lossless image formats for images less than 24bit? Those Workbench windows would look so much nicer as PNGs.
Wait... they ARE PNGs! So this means they were saved as low-quality JPEGs, loaded back in, and resaved as PNGs with all the horrible JPEG artifacts in them.
Go easy on the poor guy. He has accurately recreated the Amiga experience a la composite