I just bought a used G3 Pismo PowerBook which has no AirPort Card. I am told that to use a wi-fi cafe I should use a PC USB WI-FI dongle rather than pay $100-130 on eBay for the original AirPort card. Can anyone offer any suggestions and if this is the correct way to go? I am quite new at the game. Both OS 9 and OS 10.3 are installed.