And there is also the expectation of "But the IETF document still plays a subordinate role to that source code.'' in the original article. However one interesting expectation or requirement of IETF standards is that one expects at least one, ideally two, independent implementations based on the written spec. This would alleviate the concerns that the VP8 case is too leading - as one has now an example of an independently derived code base - which has taken the written spec as its lead - and secondly it would also give the community a very fair idea as to any residual IPR issues, by Google or by others. Thanks, Dw.