Hot news for TweetHeads: Twitter switches URL shorteners

If you access Twitter on the Web, and not a desktop application like TweetDeck, then when you paste a long URL into the dialogue box Twitter automatically shortens it. Twitter did rely on TinyURL, the industry leader, for its Web address shortening—until Wednesday, when it switched to Bit.ly. This might sound like inside baseball, but the change means a lot for those companies. Overnight, Bit.ly could overtake TinyURL has the industry-leader in URL shortening. The switch is also something of an ins…