The second season of Heroes is out to buy/rent, so inevitably the DVD goodies are being uploaded onto the internet, including: an 8-minute long alternate ending (where the Shanti Virus was released and Peter, Nathan and Matt use their powers to try and quarantine the contagion), a scene revealing Kaito Nakamura's super-power, and the Petrelli's visiting Nathan in hospital.
Amazingly for deleted scenes, all three are very enjoyable and (particularly in the case of Kaito) enlightening for fans. Enjoy.