Kevin Elliott of About.com has written a penetrating analysis of the WTC survivor registry phenomenon, which I seem to have helped kick off:
http://websearch.about.com/library/weekly/aa091401a.htm
I hope you'll forgive me if I also point out a very kind interview at News.com:
http://news.cnet.com/news/0-1014-201-7147460-0.html
If you haven't dropped by my infamous Check-In page lately, I've posted an essay about why the time for independent survivor registries is well past. I have more thoughts on that subject which I will try to force myself to post here in the next couple of days.