There is an irregular sequence of workshops on the topic.

The most recent workshop

"Non-equilibrium techniques in cosmology and condensed matter systems "

was held 11th - 13th September 2013 at DESY Hamburg, Germany

it was organized by Matthias Garny, Martin Eckstein and Thomas Konstandin

information on the program and the talks can be found here

The second informal workshop

"Solving the Two-time Kadanoff-Baym Equations.
Status and Open Problems"

was held 23th - 25th March, 2010 in Kiel, Germany
Physikzentrum - Leibnizstrasse 15

for details, including program and talks click here