Here is quick tutorial how to get your wep/wpa key and troubleshoot your ipod touch wireless with linksys router.
First we got to figure out what is your ip address of the router by default it's 192.168.1.1.
If not, go to any of your working PC's go to Start>Run: Type in CMD, Command Prompt should come up , type in ipconfig and check out what your Default Gateway is (your router ip)
In browser type in router ip for example: http://192.168.1.1/
If asked for password by default: admin (no username)
Once you are logged in go to Wireless and then Wireless Security, you will find your WEP WPA keys or passphrase (write that down).
Here is how mine looks like:
Next go to your ipod touch settings click on Wireless, double tap on your wireless and first enter WEP/WPA key if that didn't work, try passphrase.
Don't forget to read: