To me the bug is not resolved in squeeze/testing (fresh installation and upgraded: ii firmware-brcm80211 0.27 Binary firmware for Broadcom 802.11 wireless cards ii linux-image-2.6-686 2.6.32+28 Linux 2.6 for modern PCs (meta-package) ii pm-utils 1.3.0-3 utilities and scripts for power management
But the issue can be resolved with SUSPEND_MODULES="brcm80211" in a newly created /etc/pm/config.d/80brcm_module. Greets and good work, Pier Paolo.