I think that it would be illuminating to include brief references to the HoME writings where this serves to support or clarify a point raised in relation to the final text. Anything more detailed than that, however, would I think only serve to confuse the discussion, particularly as many of us haven't read any of the HoME series yet (OK OK, I know! It's on my list, alright.
).
If there is to be a more detailed discussion of the HoME material, I would suggest opening new threads for this in the Chapter-by-Chapter section.