4 links
Introducing X3D Proposal (SIGGRAPH 2002)
realism.com
Information about the X3D proposal that will be presented at the SIGGRAPH 2002 event.
Web3D Consortium - X3D Documentation
eb3d.org
X3D introduction, FAQ, X3D and related specifications, examples, tools.
Xj3D Project
xj3d.org
A project of the Web3D Consortium focussed on creating a toolkit for VRML97 and X3D content written completely in Java.