PDF math accessibility continues move toward ISO standardization

On Planet MathML (http://www.w3.org/Math/planet/) I found the very  
interesting following article:
> PDF math accessibility continues move toward ISO standardization
> Planet MathML - W3C 18/11/08 00:13 Neil Soiffer http://accessiblemath.dessci.com/
> A few weeks ago, I wrote about the first step towards making PDF  
> math accessibility an ISO standard.  I said that the international  
> ISO meeting in Beijing was going to consider a proposal for  
> including MathML tags into PDF (officially known as ISO 32000).   
> This was a proposal that Design Science made to the PDF/UA  
> committee, who approved it and sent it to the US ISO committee who  
> also approved it.
>
> The US ISO committee presented the proposal along with other items  
> to make PDF documents more accessible to the international ISO  
> meeting and I'm very pleased to report that the MathML proposal and  
> most of the other accessibility proposals were accepted.  It will  
> probably be two or three more years before these become part of an  
> official ISO standard.  Objections might be raised later on, but for  
> now (and hopefully forever), it is part of the ISO 32000-2  
> proposal.  This is a big step forward for math accessibility of PDF  
> documents.
>
> To find out more about this and other accessibility work that Design  
> Science is involved in, take a look at  our article How is Design  
> Science making math more accessible? and the other accessibility  
> solutions pages at the Design Science website.
>
I right away asked Ross Moore about it. Ross is a wonderful magician  
for PDF-from-TeX which nowadays has managed the australian society's  
works to even do in part copy-and-paste of math-formulæ from PDF, in  
TeX sources or Unicode chars. This is working impressively (see, e.g.,  
a pdf from http://www.austms.org.au/Bulletin)

I'm interested to ask Neil Soiffer, author of this blog-post, on this  
forum about the potential impact of putting MathML in PDF within an  
ISO standard. Is there anything planned to dictate the behaviour of  
selections and copy-and-paste? Are most of the PDF "players- 
implementors" ready to implement such? (for my world that would  
include Adobe for Acrobat, xpdf implementors, and Apple for Preview).

thanks in advance

paul