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smithaa02 - 5:24 pm on Oct 16, 2012 (gmt 0)
Deadsea...agreed on the pagerank front. In the article that Tedster posted from the 'other ex-googler' :P...that engineer made an interesting point about emphasizing links contained the keyword referenced. So if you want to rank for couches...your referral linking pages should have the word couch or some synonym on that page or the site. Getting a link from a website about say 'pets' that doesn't feature the word couch or variants, even if it has a high PR, probably won't help.
I also think the opposite is true. It HELPS you to link to sites that are in your keyword theme...and hurts to link to sites that are out of your theme.