I've been looking through Habbo on some media websites and found this VERY interesting piece.
We have also learnt that the company is working on a mobile Internet site called “Pocket Habbo” that will launch later this summer, which will give cell phone users access to aspects of the Habbo community, including messaging, blogging, and buying and selling Habbo currency. Then in the first quarter of next year the company plans to release a mobile client that will more fully recreate the Habbo web-based experience.
Sounds like it could be good.
Source: http://gigaom.com/2006/07/11/habbo-hotel-mobile/