As anybody tried removing scratches from the back of their Ipod Touch before?

If yes, was it successful? How did it look like after that?

You can use Google Maps though...but good luck getting wireless in your car...unless you use your mobile as a router or you have an Audi A8 which has inbuilt wifi

I think is more dependent on Internet connection?

The screen is sharper, better processor means you can do more things, camera means you can video call too. Wifi on the 4th Gen supports N, 3rd doesn't.

Even after installing the OS4.1 on 3rd Gen, cannot multitask (double tap) I tried on a friend's.

Correct me if i'm wrong.