I dashed off to Trader Joe's just before the girls' bedtime tonite and came across the most interesting fellow! He was riding what I thought was a Bakfiets cargo bike - but on closer inspection, turns out he built himself! I had a quick chat with him about it - this bike is version three, and he's been experimenting with angles to get it just right. I had a quick look and it seems very simple - an excellent trait! I plan to find out more soon, but here's a photo in the meantime. If you'd like more info, you can email him at fredsbikes at gmail.com.