On the 1st of September, researchers from the Netherlands organized a "BIM Breakfast". I wasn't able to attend, but they shared some videos and materials online at http://breakfast.bimserver.org/
The BIM Server is an Open Source, Java-based implementation of an online server for IFC files. This can be used for shared hosting of project data between building partners, such as architects, engineers and contractors. To visualize IFC files, they use the Google O3D plugin, which can be used directly inside the browser. The IFC Engine is also used, but that is Windows-only.