We are using QNX 6.3.0 with no service packs and it seems the Broadcom 57XX network card in our laptop isn't supported. 
 Has there been a driver update for this NIC?

Alternatively, would it be possible to get a 3COM PCMCIA network card to work?

This is the pci -v output for the Broadcom NIC.

Class          = Network (Ethernet)
Vendor ID      = 14e4h, Broadcom Corporation 
Device ID      = 1600h, Unknown Unknown
PCI index      = 0h
Class Codes    = 020000h
Revision ID    = 2h
Bus number     = 4
Device number  = 0
Function num   = 0
Status Reg     = 10h
Command Reg    = 106h
	I/O space access disabled
	Memory space access enabled
	Bus Master enabled
	Special Cycle operations ignored
	Memory Write and Invalidate disabled
	Palette Snooping disabled
	Parity Checking disabled
	Data/Address stepping disabled
	SERR# driver disabled
	Fast back-to-back transactions to different agents enabled
Header type    = 0h Single-function
BIST           = 0h Build-in-self-test not supported
Latency Timer  = 0h
Cache Line Size= 10h un-cacheable
PCI Mem Address = ecef0000h 64bit length 65536 enabled
CardBus CIS Pointer = 7h
Subsystem Vendor ID = 1028h
Subsystem ID        = 1c8h
Max Lat        = 0ns
Min Gnt        = 0ns
PCI Int Pin    = INT A
Interrupt line = 5
CPU Interrupt  = 5h
Capabilities Pointer = 48h
Capability ID        = 1h
Capabilities         = c002h - 64002100h
Capability ID        = 3h
Capabilities         = 0h - 85200080h
Capability ID        = 5h
Capabilities         = 86h - 84cfce0h
Capability ID        = 10h
Capabilities         = 1h - 5040fa2h
Device Dependent Registers:
0x40: 00 00 00 00 00 00 00 00 01 50 02 c0 00 21 00 64 
0x50: 03 58 00 00 80 00 20 85 05 d0 86 00 e0 fc 4c 08 
0x60: 05 10 2c 00 06 7e 00 00 00 00 02 60 00 00 00 00 
0x70: 12 12 00 00 20 00 00 00 50 00 00 00 00 00 00 00 
0x80: 00 00 00 00 00 00 00 00 00 00 00 00 fe 10 08 04 
0x90: 21 ba 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
0xA0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
0xB0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
0xC0: 00 00 00 00 00 00 00 00 0e 00 00 00 00 00 00 00 
0xD0: 10 00 01 00 a2 0f 04 05 00 20 1b 00 11 5c 03 00 
0xE0: 42 00 11 10 00 00 00 00 00 00 00 00 00 00 00 00 
0xF0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 

          Thanks