I have just finished a major update of the Department of Nuclear and Particle Physics Website.
Besides minor things, the Research Section has been redesigned from grounds up. You can find plenty of information of all groups being active in the Department, in both theory and experiment. Information is available in both greek and english.
New members (post-docs, students) have been added. Still missing: the new MSc program of study. It will be available online once official approval is granted.
Here is the URL