Twitter has been doing some serious updates lately, namely removing the character limit on direct messages.
According to Twitter staff member Sachin Agarwal: “We’ve done a lot to improve Direct Messages over the past year and have much more exciting work on the horizon. One change coming in July that we want to make you aware of now (and first!) is the removal of the 140 character limit in Direct Messages. ”
So go forth and prepare that smutty Larry fanfic for your friends, or annoy the hell out of them with massive paragraphs of nothing, whatever floats your boat.