Just upgraded to Jaguar 10.2.4 on my TiBook 500 and decided to try my PCS Merlin (C201) card again from Sprint. Success! OS X recognized the PC Card (pccard-serial). I set-up Internet Connect with my pcs username (name@sprintpcs.com) and for the password I used the ESN # from the modem – I’m not sure you need that part of it but Internet Connect demands a password so I decided that would work. There was a Sprint PCS Vison script for the modem choice and hit connect – voila! No more ThinkPad!