This isn't really a great accomplishment, but I thought it was worth trying:
http://www.columbia.edu/~em36/pb100/PowerBook100Wireless.html
Summary version: connecting to the Internet from System 6.0.8, 7.0.1, and 7.1 through a PowerBook 100 with SCSI-Ethernet adapter connected (by an ethernet cable) to an Airport Express base station linked wirelessly to an Airport Extreme router. Not exactly no-wire networking, because there's a wire between the PowerBook 100 and the Airport Express, but wireless between the AirPort Express and the router.
(Apologies for posting this again after mistakenly posting it in the PPC PowerBook forum; I've asked the moderators to remove the post that's in the wrong place.)
http://www.columbia.edu/~em36/pb100/PowerBook100Wireless.html
Summary version: connecting to the Internet from System 6.0.8, 7.0.1, and 7.1 through a PowerBook 100 with SCSI-Ethernet adapter connected (by an ethernet cable) to an Airport Express base station linked wirelessly to an Airport Extreme router. Not exactly no-wire networking, because there's a wire between the PowerBook 100 and the Airport Express, but wireless between the AirPort Express and the router.
(Apologies for posting this again after mistakenly posting it in the PPC PowerBook forum; I've asked the moderators to remove the post that's in the wrong place.)