A new update adding support for

Steamworks is currently available in beta for
Day of Defeat: Source, the World War II online action game from Valve.
Main features are 51 new achievements, player avatar support and detailed player statistics, new particle effects and a nemesis-revenge freeze cam that was taken off Team Fortress 2 development and the map dod_Palermo which is a remix of the most popular community map 'dod_salerno'.
This update also adds support for popular features introduced in Valve's Team Fortress 2 (TF2).
These include "nemesis/revenge" freeze cam and new effects driven by the particle system introduced to the Source engine for TF2.
In addition, this update will also introduce a new map, dod_Palermo, which is a remix of the most popular community map, dod_salerno. Owners of Day of Defeat: Source, retail and Steam versions, may join the beta free of charge.
Welcome to the Day of Defeat: Source Beta forum. For the upcoming update, we'll be running a short beta test period, open to anyone that owns Day of Defeat: Source.
Changes in this update:
- added Dod_Palermo, updated map based on Dod_Salerno by Insta
- added Steamworks features, including achievements and player avatars
- added Nemesis and Revenge
- added Freeze Cam
- friendly players no longer collide with each other
- many particle systems have been improved
- changed the algorithm for bullet spread to be more like the original Day of Defeat
- reduced Garand recoil
- View position is now adjusted when zoomed with rifles and sniper rifles to help with player visibility around corners
Planned changes not in this update:
- Per-player stats linked to Steam Community
- many map exploit fixes
All owners of Day of Defeat: Source can test it by starting the steam client and look under your "Not Installed" games list.
It has already been confirmed that

CS:S will be updated. The beta is already in progress; if you opt in for the current Steam client beta, you will see both the DOD:S beta and CS:S beta appear in the game filter of the server browser.
Source: ign.com