Update: Tr.im has apparently had a change of heart, and decided to remain functional. On the company blog, Tr.im's founder says:
We have restored tr.im, and re-opened its website. We have been absolutely overwhelmed by the popular response, and the countless public and private appeals I have received to keep tr.im alive.
Twitter's favorite URL shortener, Bit.ly, updated their official blog warning users of unscheduled database maintenance that will take place tonight between the hours of 1 - 3 AM EST. No downtime is expected and all links should redirect properly, but during the maintenance you'll be unable to generate new links and view stats.
URL shorteners sprang into sudden essentialness with the advent of microblogging, and especially with the advent of Twitter. Until yesterday, TinyURL was the shortener of choice, boosted by Twitter’s default shortener setting.
Twitter’s sudden switch to competing URL shortener Bit.ly not only was a surprise to many, but the move could spell an unforeseen and swift death for TinyURL. So what gives? What makes one URL shortener different from another?
So what’s beyond social networking and microblogging? Some speculate it might URL-shortening, mostly because of sheer practicality. A new type of metrics URL-shortners offer also make them attractive topic, though nobody’s quite that sure just yet.