Following the trail of snoopers, I found that Half-Life should be announced as Gold within a day or two. Sure, you may have heard that it's done and now downloading through Steam.. but apparently it must not have been done.

Shacknews: Word has it that Valve has submitted RC5 recently addressing just a couple of bugs. Assuming those are fixed and nothing more is found in further testing we could be looking at a gold announcement in the very near future.
GoneGold:Sierra should announce Half-Life 2 is gold tomorrow along with a release date. If not tomorrow then very soon, the game is done.