Yes. It will operate as a G network.
If the Nokia 'phone has a USB jack then life is easier. A Nokia shop should be able to show you if that jack is there and how best to use it
To use advantages of N type network you need to have both devices of N type.
Every computer can be wireless with the purchase of 2 items. The router as stated and now a usb wireless adapter. Both can be purchased for less than $150 and will give you coverage in and around your residence. Recommended purchase is the Range max N router from liksys or comparable "N" type router and usb adapters.
Yes, however, your internet speed will only be that of the G router which is comparably slower than that of an N router.
The difference between an N and a G router is all in what the purpose of your router is for. You need to see if you are using it for a personal or business use.
You can use router of G or N type and the same type wireless adapter. Of course you can use wireless N adapter with G-type router and reverse.
The easiest thing is to get USB adapters for all three computers.It's likely that any new laptop would be ready for wireless,but USB allows to do this effortlessly.
D-Link RangeBooster N Dual Band Router would be the best router to use in this case.
Yes.
802.11
try moving the wii closer to the n wifi usb connector/router if i doesnt work try www.nintendowifi.com and enter your error code
There is no significant advantage, you would need a wireless networking card on the expresscard slot, usb port, or on the internal mini-pci express slots.