This page demonstrates the use of embedded Flash and Java applets inside the popup windows of a Google Map. Click the markers to see what I mean. Feel free to take a look at the page source to see how its done - there's really nothing to it!
Bugs:
Comments: Post to the related thread in the Google-Maps-API group.
Authour: Richard Kagerer
Credits: Robert Jeppesen for the neat watery-effect Java applet.