Yes, absolutely. I have done it before.<br><br>Go to Sharing in the Sys. Prefs, click on Internet sharing and click Share Internet Connection with Airport (or something like that).<br><br>If the option is disabled, go to Network Settings and make sure both your Ethernet and Airport cards are active - the Ethernet card should be listed first in the order.<br><br>I've also done the reverse. With Airport first in order in Network Settings, my iBook got an Internet connection via my Airport Base Station, and I ran an Ethernet cable to a friend's iBook to share an Internet connection with her.<br><br>