I've ridden a Bike Friday NWT for 6 years now.
I play music for a living and end up doing a lot of flying for 1-2 week dates in Europe and North America. I take the Friday with me and try to do 3 day mini tours when out of the country. Beats the heck out of the hotel room.
I can't say I'd pick the bike friday as an expedition machine but for what they bill it for it works wonderfully. Using the suit case to ship is handy and he conversion to trailer realy works quite well. Again, I don't think this would hold up to extended touring.
Great commuter bike as well. I got mine with the sachs hub and never experienced a problem. The brakes were cheesy but I just replaced with some Avids. Customer support was top notch.
craig