Big news today from the Half Life Dedicated Server Announce list today for Counter-Strike: Source. The email reads as follows:

Available immediately, Valve has launched an extensive update to Counter-Strike: Source, now in beta.
The update includes a host of new features and functionality developed in collaboration with Hidden Path Studios. These include 144 new achievements, a new domination and revenge system, player stats, and more.
This beta will run for a limited time, and once complete, the update will be deployed to all Counter-Strike: Source owners for free via Steam.
The dedicated server files are available via the HLDSUpdateTool using "-game cssbeta" in the command line.
For more information, please visit
http://www.steamgames.com.
This is great news for us at Thinking Man, as most of us play Counter Strike quite a bit still. This also means that the server project will resume active development.