The wait is over: our Internet of Things Printer software and tutorials now work with the Twitter 1.1 API! Both the Arduino and Raspberry Pi versions have been updated. The 1.1 API requires that you have a Twitter account of your own (even if not actively using the service yourself), so there are a few extra setup hoops to jump through (explained in the guides for each printer kit).
Existing IoTP Arduino users are advised to update to the latest thermal printer library, download and install the Cryptosuite library and fetch the latest Gutenbird sketch. All three pieces are needed.
Raspberry Pi users, update your twitter.py script to the latest.