The SolarPuff and SolarHelix, both made by Solight Design, are great little lanterns. With a integrated solar panel and array of 10 LED lights, they do a great job illuminating your room or a tent, without lugging around batteries. They fold / twist into shape in seconds for immediate use as well. Originally designed for disaster relief and places without electricity, they do a great job backpacking, car camping or just at a picnic.
Also check out the review I did on the SolarPuff Warm White.
You can find the SolarPuff here.
You can find the SolarHelix here.