Consumersearch.com: Blenders
consumersearch.com
The site identifies which products reviewers like and dislike, where they agree or disagree, and why.
BigTray: Blenders
bigtray.com
Features buying tips and advice for kitchen equipment used in restaurants and institutional kitchens.
Mix, Blend, Chop, Process
seasoned.com
Seasoned Cooking article from 1999 about blenders and food processors.