Twitter tremendously increased the number of URL shortening services with tr.im being very famous and preferred by many. tr.im had a simple and nice website with a dashboard that gives statistics of each URL trimmed.
The Nambu Network has however decided to shut down tr.im as they wanted to get money out of it by selling the service, or at least a part of tr.im, but no one showed interest in purchasing the service. The next thing was to start charging the users, which was not possible as there are a hundred other similar services that offer free URL shortening. So, to stop the database from expanding and bandwidth from being consumed, The Nambu Network decided to shut down tr.im.
The current URLs will be active till December 31st 2009 but the dashboard and statistics cannot be accessed.
Personally, I was making an app that uses tr.im and had requested an API key, but now it turns out that it will no longer be useful. I will have to use some other API for my app. Maybe su.pr by StumbleUpon ot bit.ly
If you were a tr.im user, let everyone know what service will you be switching to now, in the comments.