Simsi - 5:44 pm on Mar 17, 2011 (gmt 0)
Fwiw, in my experience, the use of the NOINDEX META tag doesn't actually stop the pages being indexed, they just won't show in the first set of results shown to a searcher. They will however often appear in the "repeat the search with the omitted results included" results.
Pageone has kindly pointed out that what I am seeing is a result of me disallowing the 'offending' page in the robots.txt file. I must admit I had previously thought that robots.txt stopped Google crawling the 'disallowed' pages.