This work has been exposed during the FOSS4G 2007. The FOSS4G (Free & Open Source Software For Geospatial) is an annual international conference where all the geospatial open source community can meet. This year, it took place in Victoria, in British Columbia state CANADA, the last week of september.
The presentation was made by Olivier Courtin from Camptocamp, and the slides of the presentation are available here.
It talks a lot about web applications using X3D, but unfortunatly, because X3D plugins don't seems to be enough matured, we decided to reorient the work on PostGIS 3D export and the texture problematic of 3D models.
The description of the presentation is availble here.