They look quite nice and are side pull, avoiding some of the problems of the Brompton original bottom pull or alternative top pull calipers. They also have long reach, especially the front model which is designed to sit behind the fork on a normal frame.
I suspect there are all of the usual problems with bolts / lengths / recessing... and I don't think they'll play nice with mudguards...
oh well... those Brompton calipers aren't so bad, are they now? ;-)
Any pics or blog entries of this being done?