URL shortener Trim gets cut off

"We simply cannot find a way to justify continuing to work on it, or pay its network costs, which are not inconsequential," the post read.

Those expenses may have been particularly encumbering recently when Trim was hit by a denial-of-service attack last week that knocked it offline.

The blog post was tinged with more than a hint of bitterness. Twitter, the service that led to the explosion of URL shorteners as Web users needed to truncate lengthy addresses to fit into a 140-character space, has shown a clear preference for Trim rival Bitly. Twitter uses Bitly as its default URL shortener, and it's even been rumored that Twitter may acquire it altogether.

"Twitter has all but sapped us of any last energy to double down and develop Tr.im further," the post read. "What is the point? With Bit.ly the Twitter default, and with us having no inside connection to Twitter, Tr.im will lose over (in) the long run no matter how good it may or may not be at this moment, or in the future."

What the company hasn't said: what will happen to existing Trim URLs? It's likely that Nambu Networks hasn't yet decided. If Trim is completely closed, that would mean that those shortened URLs would turn into broken links. It'd be possible to close it to new entries but keep existing ones, except that wouldn't solve the financial problem.

One commenter on the Trim blog post suggested that perhaps the service could live on in the form of an open-source project. But for now, its fate remains up in the air.

Caroline McCarthy, a CNET News staff writer, is a downtown Manhattanite happily addicted to social-media tools and restaurant blogs. Her pre-CNET resume includes interning at an IT security firm and brewing cappuccinos. E-mail Caroline.