Just to clear up some misconceptions:
Most major manufacturers use Navteq maps. I have found them very good in my wife's BMW & my own previous car. The downside is that Navteq only update their maps (UK, Europe, N.America etc twice a year & by the time the map CD/DVD's are on sale they are already out of date!). The current Navteq map designation is 2007-2. The next update (2008-1) won't be available until May 2008. BMW charge approx £250 for an updated map disk! (that is £500 a year to have updated maps on your SatNav!).
Also, some of the Navteq map updates require a change of software to the Operating System (Firmware) of your car's GPS reciever to utilise map upgrades - such as 3D Perspective view - rather than a 2D "Birdseye" view. BMW will do that for £86 a time! BMW also charge £1800-£2500 for fitment of their SatNav units on a new car. And it is fixed so when you sell the car it is gone!
I know a fair bit about this as I used to supply BMW Navteq disks, which I used to add the UK/European Speed Camera Databases to.....
No commercial Navteq map (anywhere in the world) is supplied with a "Safety" camera warning/display. Navteq are Dinosaurs.
My heartfelt advice is to buy a "TomTom XL" for between £140-£240 as I have done. You can transfer it to any car in seconds, use it on foot, motorbike etc, add a UK/European Speed Camera (Fixed AND declared Mobile camera sites for £1.99 from PocketGPSWorld.com). Audible warnings of approaching cameras, AND MORE IMPORTANTLY you can just plug your TomTom into your computer via a USB port and get your map updated 24/7 totally free of charge!
IMHO anybody who specifies & pays over £1000 for a manufacturers SatNav system needs their head examining. Pay a little more than £300 to TomTom & you can buy a unit with full handsfree bluetooth voice activated telephone connectivity....
For any of you actually using Navteq maps & wanting to update to the latest 2007-2 map FOC just search a torrent such as "Bitlord", download the map & use "UltraISO" to burn to CD/DVD for your car.