At Crysis-Shooter.de we found a Crytek Press-Conference video from this years Games Convention. The quality is not really good but the comments (in German) are really informative.
Furthermore we've a PDF document from Carsten Wenzel (Crytek). Thanks to "pissdrunx1987" for the info!
- SIGGRAPH 2006 - Carsten Wenzel - PDF SIGGRAPH 2006 presentation (PDF) by Carsten Wenzel (Crytek). The working title is: Real-time Atmospheric Effect in Games. It includes 39 pages and is written in English.