Hi Stephen,
Thanks for your reply. I understand your message, and I am not that concerned about PR. However when you compare search results (urls that are ranking for certain keywords) PR is still a ranking factor. I know it is only one of the many, but it is still there. Now I can also see that sites with good internal linking structure have better "toolbar" PR breakdown, than sites without it (I am comparing sites with no external links to these deep links).
So if there is no pagerank sculpting, why do these pages have PR in the first place?
Also what is the current situation with "nofollow" links in terms of the above?