A couple that still have awhile to go before completion, but I thought I'd request them.
The Legend of Peach Boy
Nadia - The Secret of Blue Water
(sorry if the image is kind of crappy. I believe the game uses the 256 pixel wide mode, but Kega Fusion stretches it to 320x240, and stored the screenshot at double size. So, I tried to reverse it.)
(somebody able to do better at converting the official logo?)