Ubuntu Networking :: Wireless Won't Resume In 10.04

I've read many threads here on wireless problems in 10.04. I've got it updated as of this morning.

Symptom: wireless works perfectly - doesn't drop out and starts right up at boot. But if computer (Dell Latitude D505) goes to sleep, wireless won't resume. Network Manager shows wireless networking greyed out after waking.

Here's output that should be helpful:

xxx@xxx-laptop:~$ sudo lshw -C network
[sudo] password for xxx:
*-network:0
description: Network controller
product: BCM4309 802.11a/b/g

[Code]....

I've read in several other threads here that blacklisting the wireless driver file(s) may resolve the problem.

- What driver file(s) on the computer do I blacklist?