We've featured Jeff Lieberman's levitating light bulb before. He has since made the 2.0 version:
This is a revised version of earlier work. This bulb now operates at much higher wireless transfer efficiency [ie is brighter for less expended energy] and levitates at roughly 2.5" from the nearest object.
Details, more pictures, and video will be online soon. An older prototype version was made in 2005, details are available here. This piece will be shown at Sonar in Barcelona, June 14-16.
This is a picture of the new version. It is not a digitally enhanced photo or any kind of trick. It is an electromagnetically levitated lightbulb that is wirelessly powered.