I use a system called Wayfinder which is bloody good. Unlike tomtom and garmin units you cant plop Points of interest in, but i find it is pretty accurate with spedtrap locations and some of them i have found is where the police often sit as well...
It covers all of europe as far as i can tell, with a lot of countries getting more and more traffic info coverage as well, and even has a mapping of the US as well.
Downside is you have to have a compatible phone and it uses GPRS to connect to their servers, the advantage is you can download the maps as well to your mobile, have traffic info and auto re-routing depending on traffic, and its updated free for life and not a dodgey copy of some sort