After kernel update to 2.6.25.18-0.2-default, resume is broken.  It looks like it's stuck during kernel resuming as the disk and keyboard come online but I can't hear the clicking sound from sound reinitialization.  Unloding ehci_hcd before suspending and re-loading it after ehci_hcd after resuming fixes the problem, so most likely something went wrong in USB land.

For now, the following script works around the problem.

# cat /etc/pm/sleep.d/99ehci-hcd 
#!/bin/bash

case "$1" in
    hibernate|suspend)
        rmmod ehci_hcd
        ;;
    thaw|resume)
        modprobe ehci_hcd
        ;;
esac