I am considering buying an iPod Touch 8GB. But I'm just wondering- how does it connect to the internet, get a map signal, get the latest stocks, access e-mails, get the weather etc. via Wi-Fi on the go? Is there a cost for this? Also, I have an AirPort Extreme Base Station (802.11n) in my home. Will the iPod Touch pick up the internet from it? Thanks in advance.