Using Virtual Worlds for Customer Service

I came across this interesting article in ReadWriteWeb that discusses how the enterprise has not yet quite dived head first into virtual worlds, even though it has been around since 1995. Virtual worlds are different because it recreates social interaction found in real-life in a digital space. While the benefits of using it within teams are clear (social networking, real-time collaboration, & interactive training) what are some ways that we can use virtual worlds to aid customers? Will this be something more and more companies will take a look at in the future?