There are a few viewers out there. I would recommend
trying Blaxxun Contact from http://www.blaxxun.com (Click
on "Download Blaxxun Contact" in the Shortcuts menu on
the right hand side)
Cortona from Parallel Graphics is equally as good: http://www.parallelgraphics.com/products/cortona/
Blaxxun will let you join in some of the virtual
communities as it allows for "multi-user" interaction.
If you want to find out some more about VRML, start at www.web3d.org
