Kona Ute. Available at Big Wheel Bikes or Oasis Bike Works (Fairfax, Va.).
I haven't been able to obtain a price from an LBS, but these appear to go for around $900. Another option would be to convert your existing bike into a long tail via xtracycle.
The long tail concept is perfect for those who are car-free or who simply want to replace car trips with bike trips. You can load up with groceries or even give your kids a lift to school.
Here's a review from Bike Hugger.
Frame: 1 size fits all; 7005 aluminum
Pedals: Xerama Sp-500
Freewheel: Shimano Alivio (11-32, 8 spd.)
Deraileurs: Shimano Deore
Handlebar: Kona Riser
Tires: Continental Town & Country 700x47c
Saddle: Velo Comfort
Extras: 2 sidebags included (holds 4)
If you have any feedback about the Kona Ute, please leave a comment.