Several very interesting presentation from the DES workshop in St. Petersburg, July 2003, are now freely avilable from FLOMANIA's web site. The download page can be reached from here:
http://cfd.me.umist.ac.uk/flomania/index2.html
DES (detached eddy simulation) methods or hybrid RANS/LES models as they are also often called are becoming increasingly more popular. These models offer a new way to combine the good features of RANS models (handling of attached boundary layers) and LES models (prediction of vortices and turbulent flow away from walls).