anything on the app store. You have to pay for most of them.
The best prank apps for iPod Touch 4G are Pallaudio, Scary Prank, and Ghost Camera.
netflix
No but there is a few apps were you can
The iPod Touch 4G has a more wide range of apps and better internet surfing.
Skype!
about 100 or 200
No because its an ipod touch but you could find some apps that might let you/ work
2-3 hours
. The iPod touch 4G is slightly longer than the previous iPod touch 3G
If someone you know has a iPod touch 4g, iPhone 4g and IPad 2
It depends on the size of the app and whether or not you will also use your iPod touch for music and videos. Apps range from 1MB to 200MB, so if you are ONLY storing apps, then you will be able to hold around 800 apps.
Yes you can. Make a back up of the files through iTunes and then on the other ipod perform a restore from backup