lspci -v, output relevent to NIC

04:01.0 Network controller: Broadcom Corporation BCM4321 802.11 b/g/n (rev 01)
Subsystem: Linksys Device 0060
Flags: bus master, fast devsel, latency 64, IRQ 16
Memory at febfc000 (32-bit, non-prefetchable) [size=16k]
Kernel driver in use: b43-pci-bridge

This NIC had previously been working under Knoppix 6.2
I'm trying to get it to work under Debian Squeeze.
I'm hoping you lot could help me out here.
Any ideas?