When have you been to Hamburg? Did you liked the tournament?
I went to Hamburg for the first time in 2002, for the final match when Roger defeated Marat Safin and back in 2005 for the Federer-Gasquet match
It was really really nice, the Rothenbaum Tennis Center is a great place to be, much better than the Foro Italico, the Hamburg Marriott Hotel offers good packages for the AMS if you want to go, the more the merrier, I went with my family and some friends, we were 10 and the price was really good 'cuz we booked with enough advance
too bad Hamburg won't be a AMS next year