DUMBO stands for Down Under the Manhattan Bridge. It's located in Queens where old factories and warehouses from the 1800s have been converted into galleries, playhouses and expensive apartments.
I took the East River Ferry there yesterday. It only took 15 minutes to get there from the 34th Street dock where the ferry originates. I was amazed--because there were three stops in-between. For $4 you can stay on the ferry until it lights at Wall Street and begins it's loop back to 34th Street.
I enjoyed a BLT at a place called Al Mar and some lentil soup. The sandwich was made with organic bacon and had plenty of thinly sliced tomatoes (a failure of many BLTs). The waiter was kind enough to orient me towards the "micro" shops nearby, but it was a very quiet afternoon in DUMBO, and the shops' inventories were low. I'm sure on a warm sunny Saturday, it's quite the place to be.