Potsdammer Platz is great to experience in person. I just stayed five nights at the Grand Hyatt Berlin, and had a little time away from my conference to explore the area.
Current Metro - Stockton 679,687 Jan, 2007 CADOF Estimate
Current City - Tracy 80,505 Jan, 2007 CADOF Estimate
Former Metros - Kansas City, Cleveland/Akron, Omaha, Lincoln, Dallas/Ft. Worth
Travelled to 19 Countries on Six Continents