New to Wii

[Momiji]

Sounds like the Wi-Fi Adapter that Roto mentioned would be your best chance. I am not too sure how much they cost but as far as I understand them, all they do is plug into your computer and send out a wireless signal for your Wii and/or DS to receive. Unless you want to find a huge network cable to have a wired connection. :/

EDIT: Price wise, Amazon says about 32$ USD

Want a bargain? I'll sell mine for $20. I bought it and realized I already had a wireless router to work with. I don't have the original package anymore, but I have the installation disc and the adapter! ^^