Here's a great tool I am using to check if pages are do follow or not and you can also check any seo details of page such as backlinks, bookmarked links, page rank, alexa all in one click and very fast... First get FIREFOX and download SEO add on The SEO add on highlights links which are no follow in bright red saving you a lot of checking time... This is a great tool and firefox is worth using too... P.S. my new blog is DO FOLLOW and is here: self help and prosperity blog
let me complement with hard facts, the addon in question is probably Search Status www.quirk.biz/searchstatus/