Anyone else excited about the news? It was announced earlier today that Portal 2 is expected to be released on October 26 2010.
The now-edited product description cites new features, such as new characters, return to Aperture Science Labs and the return of GLaDOS, as well as introduction of two-player co-op mode with entirely unique characters and story:
"Features single and multiplayer co-op modes. The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers. Players will explore never-before-seen areas of the Aperture Science Labs and be reunited with GLaDOS, the occasionally murderous computer companion who guided them through the original game. The game’s two-player cooperative mode features its own entirely separate campaign with a unique story, test chambers, and two new player characters. This new mode forces players to reconsider everything they thought they knew about portals. Success will require them to not just act cooperatively, but to think cooperatively".