Limit Growl to one app only Is it possible to limit Growl notifications to one App only? I'm really bothered by notifications by Adium, Bowtie and lots more but I don't want to deactivate each of them manually.

Something like a whitelist for Growl-enabled apps would come in quite handy here. Any ideas or suggestions?
Very simple: Go to System Preferences --> (other) Growl --> then choose the applications tab. From here you can choose which apps you want to give growl notifications.