New Portal Update Includes Mysterious Clues: My Money is on Half-Life 3

The online videogame community has been abuzz about a new patch for Portal that adds a new radio station that includes hidden messages pointing towards... what? No one knows yet. It looks like Valve has hopped on the viral marketing bandwagon. Lets just hope they get it right and the messages don't just point to a website with no information or a countdown timer that ends with another countdown

My money is on the messages being an early clue towards Half-Life 3, (or Half-Life 2: Episode 3), perhaps only the beginning of a larger and more mysterious viral campaign. I noticed that at the same time that Steam updated my copy of Portal, it installed a hefty update to Half-Life 2: Episode 2 as well, perhaps there are some clues there as well.