According to the article 57b of the Swiss federal law last month, the PND with a speed camera warning function may not be bought, installed or put into vehicles, or even used in any manner.

They may not be put on the market, i.e. fabricated, imported, sold or subjet of commercials.

According to the OFROU (Federal Road Office in Switzerland), police and customs may take those devices and establish a lawsuit. The tribunal will fix the fine and may judge the device's destruction. The OFROU has arguments and Tomtom politely answered. Yet, it advises the TomTom GO, RIDER, NAVIGATOR 6 and TomTom ONE users that have installed the Swiss Safety Camera Database to remove it when traveling in or through Switzerland.
Others involved devices are Garmin, Mio, Navman, Medion, Route66, Packard Bell, Sony and ViaMichelin ... at least.

Source: Engadget, beginning of the month.
For those who do not know: Some Portable Navigation Systems (PND) can warn you when you approach a fixed speed camera, if you installed a database provided by the manufacturer (Tomtom for example, the Safety Camera Database). This database can be updated day in day by using the police information or by the users via Internet or a mobile connection… Then you can download it regularly. If the process is fast enough, it's even possible to be aware of the position of the mobile cameras.