Tagxedo

Tagxedo is a kind of word cloud with a wide variety of images, and the option to use your own images to create shapes.  You can copy your own text, draw text from a web link, Twitter or newsfeed.  Customize color, font, theme and orientation.  There's much more available here.  Good resource for cross curricular activities.  You must install Microsoft's Silverlight plugin to run this application on your browser.