Wireless card(s) available for the Inspiron 531s?

I'm looking to move our Inspiron 531s to a different part of the house which will require us to add a wireless card.  I'm not finding any cards on Dell.com that show compatability with the 531s and online searching is not giving me a clear answer either.  Anyone have a recommendation or two?

UPDATE:  Or, I guess just grabbing a USB adapter probably is the easier way to go.  Anyone have any "cons" to this idea?  The desktop would be primarily used for kid's homework and web surfing.  Probably some gaming, but no online multiplayer so speed isn't critical.