Yes, several apps appear in the Growl list. On my MacBook Air, where I also have Espionage installed, it appears in the Growl list there.
On the iMac, however, Espionage was previously sending its notifications (successfully) through Growl 1.x. When I realized, however, that 1.x was installed, I downloaded installed and launched Growl 2. I assumed that launching Growl 2, it would prompt me to remove the running 1.x; but it didn't. I then manually stopped and removed 1.x.
Then, after several combinations of starting and stopping Growl 2 and Espionage (in various orders), and even restarting the computer, Espionage is not appearing in the Growl 2 list.
Any ideas? Thanks.