I select some text in Safari. I click and hold until it becomes draggable. Now I hit F9. All of the windows shrink. When I place the cursor over the desired TextEdit window, the cursor becomes a white circle with slash, indicating that I can't drop there. However, a moment later Exposé brings that window to the foreground and I am able to drop my text. Elegant!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20031028002452130