...is likely the PCMCIA slot that the Wireless card is plugged into. As you don't let Windows finish finding or installing the driver for the slot, any card currently plugged into it won't appear.
When you then remove the card, and re-instert, Windows will load the drivers automatically, and the card magically appears.
As far as locking up after hibernating. You have to tell the OS and hardware how to wake up out of hibernation first. Otherwise once it hibernates it can be a problem waking it back up. Usually in systems that haven't had this set by the user (Power Options in the Control Panel and PC's BIOS) a quick press of the power switch wakes the system back up, although again this is hardware dependant.
I have a Compaq Presario laptop (model 2129CL) that is having a weird problem with a Trendnet wireless card (TEW-441PC, PC-Card). I had to reload XP and now whenever I reboot it finds new hardware and tries to find the drivers for MTD-002?!??!?. When I cancel out of it and let XP finish booting up, the only thing out of the ordinary is the wireless card is nowhere to be found. I can remove the wireless card and plug it back in then XP see it just fine. Any ideas? One more thing, and I'm guessing this is somehow related... XP locks up when I boot up after hibernating. The above symptom is when it comes up from full reboot. Any help would be greatly appreciated. (BTW, I did install all the patches to XP and loaded the latest Presario 2100 drivers. I also flashed a BIOS update to fix a fan problem.)