Valve has released a new non-beta build of their Half-Life dedicated server files. There are 18.104.22.168/22.214.171.124 to 126.96.36.199/188.8.131.52 updates for Windows and Linux, and the full 184.108.40.206/220.127.116.11 downloads are available for Windows and Linux as well.
Maybe we could get some single-player fixes like for elevators on level changes sometime finally?
new GUI for win32 server.
I would assume that any updates for 1.6 servers would be delivered via Steam.