To the Santa Claus is Hacking in Town challenge. You can find it here: Santa Claus is Hacking to Town - Answers and Winners. Unfortunately my answer wasn't accepted 100% because of a small misunderstanding, but it got cleared up and all is good now :-). The RaDaJo blog also posted a detailed solution (warning! pdf!). It is nice to find out that Metasploit already has this ability, you don't need third-party tools. Hopefully search engines will pick up the text from the PDF, so that more textual information will be available about it.