I've been working at Sulake for four months now doing Habbo graphs so here's some of what I've done. Unfortunately I can't post any WIPs because I can't show anything before it's done and tested and integrated and so forth, so I can't do any changes anymore but I'd be glad to receive feedback anyway. I know the Habbo style irks many pixel artists but I can assure you that trying to maintain the elements that make it look Habbo is a constant matter of discussion at Sulake as well. Me and a few other graphic guys spent once two hours in pub just discussing the pros and cons of black outlines.
So.. the Bollywood set, my first furnis. The palm tree was fun to do although I think it would have benefited from being a bit darker and more contrasty.
The furnis in use:
Then, the Lost City set. The bubbles inside the tube thing animate, and so do the fish in the glass floor thing. The tubes were fun to do, make it so that you can build Pipe Dreams -like constructions using the water tubes. The wall graphics have an obvious Cadaver influence.
Aaand.. what they look like in Habbo: