Lily, I heard about this too, but am not sure if it really works. It sounds very similar to stem propagation on Phals. There are certain dendrobiums that put out a gazillion keikis, seemingly from every node on the cane; we've got a Spring Dream "Apollon' that does this. I'm just not sure whether it's because the blooms also appear on just about every node, or because of some other reason. It will be keikis, though, that come up through the process, assuming it works: the old cane pieces themselves will not root and start growing.