Visit http://naqsha.net/googleapi/ to view detailed maps of Pakistan overlaid on Google Maps satellite imagery. Road names and Street numbers. All provincial capitals and other major cities have detailed street level maps.

Current list of cities (more to be added soon):
Islamabad
Karachi
Lahore
Peshawar
Quetta
Rawalpindi
Faisalabad
Multan
Hyderabad, Gujranwala, etc.

Also get the same Maps on Facebook. Add the Pakistan Maps Facebook Application at http://apps.facebook.com/pakmaps/.