I just came across this gallery site and forum that is a little unusual. It is an Manga style art site focusing on cute female characters, but each character is themed based on a different system and OS. And these include a few Commodore and Amiga themed ones.

http://ostan-collections.net/imeeji/

Quite a high quality of artwork and quite a unique and original idea.

Here is the main Commodore/Amiga themed artwork.