The concept is indeed interesting. Thanks for the heads-up. However, the real problem arises that whatever is used to flag the TapDance mechanism at cooperating sites may also eventually be detected by a determined censor and blocked. More seriously, the concept requires a TapDance software tool to be installed by the user; but in at least some of the censoring nations, the possession of such a tool installed on a system could (and would) be declared illegal in a major way. Hence detection of the TapDance technique being used would lead directly to legal sanctions on the computer owner/user through traffic-tracing back to his IP. In some censoring nations, those sanctions are extremely serious, particularly if the user has installed a covert censorship-avoidance tool on his system which implies deliberate intent to circumvent.
The Slitheen concept mentioned in the article seems more covert and thus probably more secure, resembling steganography in its ability to hide information. Unfortunately, just as with steganography, it's restricting and cumbersome to employ such embedment for large or dynamic information packets.