In an altogether-far-too-late response, I was at CeBIT until the end of Friday. I'd have mailed you, but sadly I don't get e-mail alerts anymore, so I missed it. Just to make this posting even less relevant, I'm not working on ACS-related projects anymore, but I would happily have met to say hi anyway.
Have fun at the show. The best way there is to take the line 18 tram, unless you want to grab a taxi at 7am (one day of the show left, you never know, it might be worth posting).