Help me fix Linpus with my new Broadcom card

I recently RMA'ed my AAO because of problems with WiFi connections hanging. My AAO is the XPHome Hard Drive model, and I had set it up to dual-boot using the Linpus disk image and the how-to that is stickied in the multi-boot forum. When my AAO was returned, Acer had replaced the Atheros wifi card with a Broadcom. The wireless works under Windows, (though the indicator lights don't work right), but under Linpus the network manager doesn't see any access points. The wifi switch does pop up the enabled/disabled pictures on screen, but doesn't seem to do anything else.

I'm no command line expert, but here's what I know to check. The relevant line from lspci is:

Code:

Network controller: Broadcom Corporation BCM94311MCG wlan mini-PCI (rev 01)

and iwconfig returns:

Code:

eth1    IEEE 802.11b/g  ESSID:""  Nickname:"Broadcom 4311"
       Mode:Managed  Access Point: Invalid
       RTS thr:off   Fragment thr:off
       Encryption key:off
       Link Quality=0/100  Signal level=0 dBm  Noise level=0 dBm
       Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
       Tx excessive retries:0  Invalid misc:0  Missed beacon:0

Anyone got suggestions?