Growl broke for me too. I was using it to send notifications to my phone using PushOver.
My workaround is to use EventScripts, which I was already using. So, this script, embedded in a Hazel rule is working for me:
http://www.mousedown.net/mouseware/Event_Scripting.html (scroll down to PushOver notifications)
Does anyone have an easier way for sending a Hazel generated message to PushOver?
Thanks.
my AppleScript in case anyone else needs similar:
set theDateTime to current date
set pushoverMsg to "
some-message at " & theDateTime
set userKey to "
your-pushover-user-key"
tell application "EventScripts"
set theResult to send pushover pushoverMsg using user key userKey
end tell