The WorkCycles Oma is available at Adeline Adeline in NY. I'm pretty sure this is the bike I spied on U Street here.
From their website:
The iconic Dutch granny's bike with gracefully curved tube and tall head tube to sit upright or fit a front child seat. Our oma is hand-built in the Netherlands and constructed with large diameter tubing and a reinforced seat tube so it's much stiffer and stronger than similar looking frames from other manufacturers.
WorkCycles city bikes are practical, beautiful and durable transportation built to provide decades of reliable service in all conditions. Like all Dutch bikes they're equipped to ride comfortably upright, stay clean and dry in street clothes, and carry your groceries, gear and children.
It goes for $1599. Hey, no one said good bikes are cheap.