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Well, can you share a link to one of your documents so we can check it out?
 
And if you hit an iWork.com document on the iPhone, it opens the PDF version of the online document. Can't add comments (yet), but at least you can read it. Kinda nice.
 
iWork.com certainly looks nicer for sharing than office.live.com and (awful) google docs or zoho.
 
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