Here is the code for the recaptcha panel. I don't feel like creating a project for this but others have expressed interest in it.
Panel: http://pastebin.org/29726 SRC: http://pastebin.org/29725 NOTE: this library has a dependency lib. You can download it here: http://code.google.com/p/recaptcha/downloads/list Obviously, you just need the lib for java.
