I asked urlBorg users to rate the app in the AppEngine application gallery and got some enthusiastic comments:

One of the best url shortening tools - jim.hellas - May 24, 2008
UrlBorg has a very simple interface, provides personal account and helps you keep track of your urls. Simply the best

The best out there! - kostis_at_quatzacoalt.com - May 24, 2008
My choice for URL shortening! Useful features! I’m sure more are on the way!

Great stuff - stefanos.kofopoulos - May 24, 2008
…now running on scalable environment.

urlBorg rules! - niels.vaneck - May 24, 2008
Scalable url shortening in combination with user accounts makes for a very useful service.

Wow! Thank you!