buckworks - 8:31 pm on May 30, 2010 (gmt 0)
Here's a gotcha to be aware of:
If you have some pages that the robots.txt says not to crawl, and those are getting indexed as URI only listings, it makes intuitive sense to add noindex at the document level.
But remember that the noindex directive will only be seen if the page is allowed to be crawled!
Give thought to the order you're doing things in. If you do something new in one corner, you might have to undo something old in another corner to get the desired results.