If your wireless network hub is set up with a MAC address filter/white list then you'll need to collect all the MAC addresses from your new toys in order to get them connected.
First up in this series on finding MAC addresses is the Apple iPod Touch because its near and dear to my heart.
From the Main Menu of the iPod you want to choose the Settings option. By default this will be in the bottom right-hand corner. The icon is a series of metal gears.
Choose the General option, which is the third from the top and at the top of a contiguous list of options.
Now, choose the About option. Scroll to the very bottom. The second to last item in the list is Wi-Fi Address, which is just the MAC address for the 802.11 network device. The value itself is a string of twelve hexidecimal characters with colons between each pair of characters. It looks something like: xx:xx:xx:xx:xx:xx where "xx" are two hexidecimal characters. The first half of the string should actually be "00:22:41" because all Apple devices should start with the same substring!