Yeah, 20km is not an issue - as for the wind, I commuted yesterday which saw those types of winds but my commute is only half of yours.

The gearing is, lets say, interesting. I got the 6 speed (with the +6%) which is split between 3 speeds in the hub and 2 rear cogs. What this means is that for half of the gear steps, stepping to the next gear requires moving two levers. As well, shifting a hub requires you to stop pedaling, and shifting the derailleur requires you to pedal. At first you have spend more time thinking about the shift than you are accustomed to but after a couple of weeks, you become reasonably accustomed to it. The Brompton designers chose this layout to minimize weight and friction (read maircrosoft.com/moofle/pdf/BromptonProductAnnounce2009.pdf for more info). That being said, the gearing is quite wide and I havent ever found a condition that I felt I lacked enough range.

Yup, I puchased it at Curbside after several test rides at both Urbane and Curbside.