Half-Life 2 for Sale?

Valve sends an explanation for why Half-Life 2 is not being activated at this time in spite of the couple reports of it being available at retail already:
Half-Life 2 For Sale?

If you have purchased a copy of Half-Life 2, we are sorry you are still waiting to play. This is not Valve's choice. Vivendi is insisting that the game has not yet been released, and has threatened that Valve would be in violation of its contract if we activate the Half-Life 2 Steam authentication servers at this time.

Thanks for your patience and we will update you when we have more news to share.