Via BB: The changelog for the last Steam update for the infamous Portal contained this cryptic item:

Changed radio transmission frequency to comply with federal and state spectrum management regulations.

Which, of course, prompted an immediate nerdcore investigation.

The results? The radios in the game have been modified to transmit morse code when they are moved into certain locations on each map.

The morse code? Encoded SSTV images watermarked “Aperture Science” that hint at a Philadelphia-like experiment conducted by Aperture aboard a research ship called the Borealis, for which GLaDOS was the authorizing signatory.

In essence: the viral campaign to launch Half-Life 2: Episode Three is off and running, and it looks like they’re more-fully integrating the Poral microcosm into the overarching story.

This is how you engage an intelligent audience.

Nerdgasm!