Yes, it is difficult to reflect the intention of the interviewee perfectly from a quick interview. The ACS quote is one of them certainly. ACS will most likely accept stuff that you said at a conference but I don't think they will accept a publication that appeared on Nature Precedings first (I don't know for sure the answer to that but I suspect it is no - same for a paper written on a public wiki then submitted to an ACS journal).

I suspect that there is some wiggle room there, even with ACS, and we're going to find out by actually attempting to do these things. Also policies can change quickly as publishers realize the opportunities they may be missing by not being flexible. Time will tell.

But the fact that we are now discussing this issue in public and invite the publishers to participate in the discussion is a clear demonstration of the usefulness of Web2.0 tools and philosophy.