If you happen to pass by an old Nintendo Gameboy printer (something I didn't know even existed until today) - you can interface it with your Arduino-compatible boards very easily. Using a collation of instructions and example sketches by Miles Burton, text and images can be printed with relative ease. It turns out the printer has a relatively simple serial interface, and perfect for inexpensive hard copy.
For more information, including a description of the serial protocol used, example Arduino sketch and other notes, visit Miles' project page. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
If this sort of project intrigues you and you're new to Arduino, the first step is a solid board for your projects - our Freetronics Eleven - the Arduino-Uno compatible with low-profile USB socket, onboard prototyping space and easy to view LEDs: