Edit list of shortening service …

I will add tr.im to the list--however, it will be the "simple" version. This means that you won't be able to save the shortened URLs to a specific tr.im account.

The more intriguing question in my mind is--are you suggesting there be an extensible system whereby another module could implement a hook to add new services to Tweet? That seems like a good idea to me. It doesn't exist now, and it doesn't seem particularly difficult to do, although I probably won't have time to do it until at least the Tuesday after next.

I've added tr.im to the list; however, I'm observing that it's slower than some other services. Also, it returns the shortened URL plus a line break, which is kind of weird but doesn't actually change what Twitter shows once the Tweet is submitted. There's really not much I can do about that.

I also added a hook to allow anyone to easily specify additional URL abbreviation services: hook_tweet_service($original). See the documentation for details; basically, you just need to return something like array('service_name' => 'http://api.abbreviation-service.com/?url=').

These changes are in dev and will be in the next full release as well.