Meet Stream Cheese: a battery-powered scrolling LED sign that lets you communicate with the world. You can use it at your place of business or while riding a bike on the road. It supports up to 20 customizable messages and an IR remote. Stream Cheese has a bright enough display to be seen in day light. It supports 4 scrolling modes.
Stream Cheese runs on 3 AA batteries. It has 2 brightness levels and can be customized from the web. You can find out more on Kickstarter.