Mine is on my iPhone it's tom tom and covers all western Europe best part it was free!!!
Pm me if you want to know how, (iPhone must be jailbroken)
so stick that in your pipe iPhone haters....
I have the whole western europe one on my iphone too, although I paid about £70 for it.
Definitely worth it though. I got the tom tom car cradle to go with it (about £100). Sounds expensive, but now I've got ipod, sat nav and hands free phone all in one.