We mentioned the Windows Phone "Ghost Hotel" publicity stunt back on December. At the time, we were a little unclear what exactly the event was, though we surmised it had to do with regular people being a part of some live role-playing/mystery event. Turns out, we were pretty spot on as WP7App.de confirmed with us at the time:

"That windows phone hotel was a PR event where you had to chase ghosts (ghostbusters-style) with an app on a Lumia."

In fact it was more than that as they were basically recreating the classic 1984 movie 'Ghostbusters' but with a Windows Phone twist. The teaser video was fun but now we have a longer video posted by Microsoft Germany that sheds light on the whole Windows Phone-Ghostbuster media event. And it looks like it was a lot of fun.

Well, it is in German and features a lot of QR codes, but you'll get this gist. Once again, kudos to Microsoft and Nokia for another ingenious show.

Source: Microsoft.DE; Thanks, Andrea M., for the link--sounds like you had a great time!