How does the wireless work for the iTouch?

Do you have to pay for it, or if you already have a laptop in your home and you have wireless can you sit in your house and use the iTouch to get online like that? Also, if you have the iTouch, do you like it a lot better than the nano? If so, why?How does the wireless work for the iTouch?
The ipod touch has wifi capabilities built in and so if you do have a wireless router your ipod would pick it up. If you have a password or something all you do is enter it when prompted.

You don't have to pay for this as you are paying for the internet already. It works just like a laptops and you can go around the house.

Also the ipod touch in ten times better than the nano. For example the nano doesn't have wifi, apps and has smaller storage facilities. The nano goes up to 8gb whereas the touch goes up to 32gb. The touch may be larger but has a larger range of things that it can do.......How does the wireless work for the iTouch?
It uses WiFi, your home network. It's free