Twitter launched it's own Tweetstorm feature! They made it easy to create a thread by adding a plus button in the composer, so you can connect your thoughts and publish your threaded Tweets all at the same time. 🐥
Update: As of 2300UTC last night the plugin will no longer work on Twitter.
Tweet up to 280 characters using the new Twitter cramming feature, which otherwise is only available to limited users.
WriteRack is the best way to tweetstorm.