Thanks to friend Tena in the Bay Area, here's a link to Peter Hoffman's blog - in which he describes railbiking in Patagonia, no really, on what looks like a Bike Friday folder with an outrigger. The link will take you to his introduction. I feel sure you can find your own way around his blog from there.
Happy New Year everyone! Enjoy (old bike racer) Peter's travel stories/films/photos and have a super 2010! Maybe, like Peter, you can railbike Patagonia!