The rise of Twitter as a social-media powerhouse and its micro-blogging platform has created a renewed urgency for URL-shortening services.

There are now endless numbers of websites vying to shorten your too-long tweets to conform to the 140-character limit, but as in every competitive industry not everyone can survive and thrive. This week one of the players, Canadian-based Tr.im (owned by Nambu Network), announced it was throwing in the towel.

Now a small business closing up shop is not normally newsworthy, except when they cry foul as the ship is sinking. While on the one hand Nambu president Eric Woodward told Computerworld's Gregg Keiser that Tr.im was "accepting the realities and moving on," he also seized the opportunity to take a shot at Twitter for making Bit.ly its default URL shortening service.

"They're the default, and even if we're better, it won't matter, so what's the point?" said Woodward. "As soon as Bit.ly was made the default, the game was over."

Tr.im initially announced its demise through a blog post last Sunday, but 48 hours later did an about face to say it had been resurrected and will keep on trimming those URLs "indefinitely, while we continue to consider our options in regards to Tr.im's future." (see Tr.im blog post)