ipod touch & imac with dsl internet

hello. I am a very happy owner of a new imac. I use a dsl modem to connect to the web. I also have a new ipod touch. I want internet on my touch.
I see there is a "airport" symbol on my menu bar, is this feat as easy as setting up a network thru airport? No other things to buy??
thanks-

Yeah you can create a wifi network thru airport. I would suggest paying $30 and getting a wireless router though.