Daniel pointed me towards this great proof of concept of HTML5 Color Cycling using the canvas element and some old school 8-bit thinking (specifically; Mark J Ferrari and LucasArts). I'd say it's a faithful tribute but it's more than that as the cycles are pulled directly from the original Amiga files and converted to Javascript. You can get right to the goods by going straight to the demo but I suggest reading the background info first to get a full appreciation of what all is happening. It's nuts!