V-brake cantis are stock on the Xootr Swift.
http://www.xootr.com/xootr/swift/specifications.shtml
The road calipers on the bike shown in this thread are aftermarket. You can get Swifts built with road calipers from Peter (as distinct from Xootr). If you mean touring style centerpull cantis, you could mount cablehangers on the seattube and steerer tube, but why would anyone want centerpull cantis?