I just restarted Google Chrome after clearing out my cache, and found a link in my tabs box showing a themes tab:
I thought: Wait a second, Chrome has themes?! Hadn’t heard of that one. Excited, I clicked on the link. However, it takes you to a 404 file not found page.
It looks Official Chrome themes are coming shortly. I am running the dev channel version 18.104.22.168.
Edit: Looks like cnet has an article about Chrome theming!