Cross posted from w3c list.. I have searched the archives and been unable to resolve this to a great answer and I just want to make sure that my understanding is correct lest I have to unwind things later as someone has recently made me second guess what I thought was a logical understanding of things. Essentially, x.wordpress.com and y.wordpress.com both allocate and use space - no problem, right? Access is subject to the browsers -general- sop, (leaving aside the ability to document.domain up one), right? If I have two affliate sites who communicate across an explicit trust via postMessage - is this problematic? I thought not, and it doesn't seem to be - further - I cannot imagine how it could work otherwise and still be useful for a host of common cases (like the wordpress one I mentioned above). I have been told that the draft contradicts my understanding, but I don't think so. Thought that some manufactures/maybe Hixie could set me straight...?
Brian