Wi-Fi availability

[Swamp Rat]

I visited Telstra today to but a Wi-Fi broadband modem (the only
service that will work in country towns) and was told they do not
support Ubuntu or any other flavour of Linux. I don't want to spend
$175 on a modem that doesn't work. I have an Asus Eee 901 and have
just converted it to Ubuntu UNR. Everything works fine including Skype
with webcam/audio. I desperately need comms. Does anyone know if a Wi-
Fi will work with Ubuntu/UNR and how to get it going?

Grateful for any assistance. ps -I have low end knowledge of Unix/
Ubuntu so pleeez make it simple.