Common Need, Inc. recently announced a virtual world creation and hosting service based on Wonderland. On their web site, they say: "Common Need, Inc. provides a full suite of services across hosting, design, and integration for virtual worlds developed using Project Wonderland, an open source technology sponsored by Sun Microsystems. Our mission is to combine the best of virtual worlds, learning technologies, and social networking to create cutting-edge learning environments on behalf of our clients."
Common Need is focused on the education market, but in talking with the Stuart Sim, their Chief Technology Officer, he told me that they are also available to work with businesses interested in doing Wonderland proof-of-concept projects.
Check out the Common Need web site for more details about their Virtual Immersive Environments services.