> i dont know much about it ... what do i need to know...?

Lets start by asking what is it that you want to do?

a) Connect to the internet at home wirelessly to a home access point
b) Sit in a hotspot such as McDonalds/Hotel/Starbucks and use an access
point there
c) Hijack your neighbours wireless signal
d) Connect to the wireless LAN at your place of work?
e) All of the above
f) None of the above

David.