Robert_Charlton - 7:34 pm on Apr 23, 2012 (gmt 0)
I'm not sure, if you have to nofollow them too. I usually don't.
nofollowing the pages is a bad idea, as it stops the circulation of PageRank through the site.
I think whether you noindex them would in part depend on the length of these reviews and their function. If the reviews are vendor reviews on an ecommerce site and are intended to provide unique content to areas that use basically boilerplate product description, then the dupes might hurt on several of the sites, and you don't necessarily control which ones. Perhaps providing some additional material on some of the dupe review pages might help.
A lot depends on the authority of the site, and beyond that on the authority of the page. Using templated or dupe content on a well-known PR7 site is a very different experience from using it on an obscure site with less outside validation.
1. Use noindex meta, specify the pages in robots.txt and request the page removal via Webmaster Tools
Note that the robots.txt conflicts with the noindex meta. It will prevent Google from spidering the page and seeing the noindex. Also, requesting page removal is IMO both overkill and possibly dangerous... and if you drop robots.txt it shouldn't be necessary.