Valve has released the version 1.1.0.0 update for Half-Life. This new version adds the new Half-Life netcode, as well as the VGUI revamped in-game interface, Team Fortress 1.5, a spectator mode, and lots more (a full features list is on our download pages). Here are links to our local copies, complete with mirrors:

• Version 1.0.1.6 to 1.1.0.0 patch (21.7 MB)
• Version 1.x to 1.1.0.0 patch (37.5 MB)