I was browsing Engadget this morning, keeping up on all things gadgety and new, and I came across the SoundBulb. A light bulb with a little speaker inside ... what will they think of next! It's designed to wirelessly stream music, so you can rock out anywhere just by changing a bulb. It's still just a concept, so you'll have to wait to get your own.
Here's a more detailed article about the SoundBulb at YankoDesign.com.
