Palm Pre

Hi, I have been thinking of getting Pre ever since it was launched in the US. I waited ages for it to be launched in the UK, and now it is finally here. However looking at the UK version I have spotted a couple of matters I would like clearing up:

1. GPS/Navigation, In the US it is provided by Sprint Navigator however who is it provided by here. If it is not natively on the phone are there any 3rd party solutions?

2. The app catalog, is this going to take off? Are we going to see any decent apps?

3.Is the unlimited web, actually unlimited?? (Very Important for my usage)

Cheers for your help, Matt