Aperture Scie– err, Valve just put together this video highlighting the successes of their "Portal recruitment program", and yesterday's announcement that the game is free on both Windows and Mac through May 24th. The video's highlight: the tramp-stamp dig at Half-Life universe corporate rivals Black Mesa.
Also noteworthy for people who haven't been following its progress closely: Aperture's assertion that the Free Portal initiative is crucial for helping find skilled partners for the upcoming sequel's co-op mode.
Portal is FREE! [Valve]