As always I will be happy to help my fellow U2-fans out on any questions you'll have about Amsterdam, where to go and how to get to the Ziggo Dome.
For the people that have been here before: the public transport system has changed, there's a new metro (subway/underground) line and lots of trams have changed routes. Another thing to be aware of is that the Amsterdam ArenA, which is called Johan Cruijff ArenA now, hosts a football match on Sunday afternoon. That match starts at 16:45 and will end approximately at 18:30. So be aware that there will be a lot of people in and around the stadium when you are traveling to the Ziggo Dome (which is just besides the stadium).
Questions? Need advice? Just ask.