Rated 5 out of 5 stars
This is a truly great little application. I use the Whos.amung.us services for years on my websites and this is just what I was missing (I asked you once to develop a desktop app but this FF addon is comparable) thanks folks !
Tip: you find the site key most easy on the website under 'Account related preferences' near the bottom.
Very recommendable is you like to follow the activity on your websites 24/7 !