Eurogamer brings news that Half-Life, its two addons and some of its more popular mods, are to be updated with Half-Life 2's source engine. Valve's managing director, Gabe Newell, stated that they would not be free, instead they are to be released in shops and for payment downloading on Steam, at a probable budget price.
Counter-Strike, Team Fortress, Opposing Force and Blue Shift are also expected to join Half-Life in the update, and can be expected for release at the end of Summer.
You can also check out their lengthy interview with Doug Lombardi here. They cover a wide range of topics, from movie talk to Half-Life 2's expansion pack plans.
UPDATE: Forum member d8cam confirms that Counter-Strike: Source will be seperate from Half-Life 2, during his short talk with Gabe Newell:
This begs the question; will the updated Half-Life (as well as Day of Defeat, Team Fortress Classic, Opposing Force and Blue Shift) be bundled with Half-Life 2, or will it be seperate like Counter-Strike: Source?