This applet is not signed. Among other things, this means you can't connect anywhere except the machine that it is hosted on, and it is not allowed to access files on your disk, so it can't save the host's public key. Sorry.

(Why all the wasted screen space? The HTML page has to reserve space for the applet before it knows how big fonts on your system are. For a more intelligent version, look at the page that spawns a new window.)