Out of nowhere it seems has come this application called ExitReality from an Australian-based software company.
In short, it's a browser plugin that converts any web page you visit into a 3D environment. I have only just started to tinker with it so I don't know much about what it is capable of but at first glance it seems pretty nice.
Edit 1: I was just in The Coffeehouse and while all of the content is there it seems to be having serious trouble presenting it in a 3D context. For a better idea of what it can do take a look at some of the examples given on the web site.
I'm wondering how difficult it would be to get The Coffeehouse looking nice in this thing.