The NOS site says the application works on Symbian, Windows Mobile, UIQ(July), J2ME(Java) and Blackberry and "in the future" on iPhone and ANDROID. You get a live video, a graphic of the current situation and a written report. The service is free to "the end of 2008", although you have to pay your phone operator's charges. An example can be seen
here (the video isn't working probably because the NOS isn't transmitting any live images at the moment).
Edit: if you click the link to go to the site, click the orange navigation buttons on the phone to make it work.