My understanding is that no, you cannot use a third party card in the AirPort internal slot. Although it might fit the PowerBook will not recognize it, this done on purpose by Apple. However, you could simply slide the Cisco card into the slot on the side of your Pismo. It will definitley work that way.
Odd that your AirPort card would not work. It should access any 802.11b network. It's a universal standard, and I know for a fact that Proxim's SkyLine card and Orinoco's WaveLAN cards work with my home AirPort network, at least under OS 9. Usually, when some one's AirPort card fails on another network the cause can be traced to a misconfiguration on the part of the user. Then again, never underestimate the stupidity of network adminsitrators and their inate ability to screw Mac users.
Odd that your AirPort card would not work. It should access any 802.11b network. It's a universal standard, and I know for a fact that Proxim's SkyLine card and Orinoco's WaveLAN cards work with my home AirPort network, at least under OS 9. Usually, when some one's AirPort card fails on another network the cause can be traced to a misconfiguration on the part of the user. Then again, never underestimate the stupidity of network adminsitrators and their inate ability to screw Mac users.