Having the option to toggle the names of the underlying roads, streets, highways, etc. like the local news chopper does would be cool.
You can use external map tools that track your position over street or satellite maps. Plan-G and Little Nav Map are good examples and they also work as flight planners.
Cheers
I think he wants it on the PFD.
I use this. Works great:
http://fswidgets.com/shop/product_info.php?cPath=28&products_id=52