I have just read this post from the blog à Ollie and I was really interested.
According to the Zatoo's website, "Zattoo acquires, transports and presents quick-start, long-play streaming video in one browser for all channels for broadband users anywhere". I downloaded this free software and installed it. I just tried to show some channels a couple of minutes and the results is very good.
The software is in beta and currently it offers 21 channels, all the swiss ones with a nice quality. Of course, it depends of your bandwith....
As I don't want to subscribe to a Bluewin TV service, it is a good alternative.