Yes, I have two laptops with wireless networking.
If it's a PCMCIA card (those little credit-card sized ones), make sure that /etc/rc.d/rc.pcmcia has execute permission (chmod +x /etc/rc.d/rc.pcmcia).
If you run "ifconfig -a", does it list a card that's not your wired card? If not, you need a driver.
If it's a Centrino system, you'll need the ipw2200 drivers, which can be found at
http://ipw2200.sourceforge.net. If that's not what you have, then you're on your own finding drivers.
You use iwconfig to configure your card on Linux (ifconfig does it on BSD, fyi). It comes with the wireless-tools package in Slackware. You can see/use my configuration file here:
http://www.javaop.com/~iago/home-wireless.shI personally prefer manually running that every time I restart. If you would prefer not to, you can look into playing with /etc/rc.d/rc.wireless (which also comes with wireless-tools). I personally don't use rc.wireless or rc.inet, though.
Hope that helps.