it depends on what you use them for and if they`re universal charges.
ipods come in all different colours
well there are many i think there are about 4 or 5 different ipods and they are so fun
No
Of course you can.
No
yup :)
No
Ipod docks can only be used for one ipod at a time when it is playing, but they can be used by many different ipods belonging to severaly different people.
No they are different sizes for 1 and ipods look different to mp3's. These are only a few so anyone can do a better answer.
the different types of charges are positive and negative charges
Here Is a App review site
No. In the iPod Touch's case, it is too thin. For other iPods, they are different shapes than the iPhone anyway.