As someone who usually spends WAY too much time researching most of my purchases (anytime I don't, I make a huge mistake), I'm always excited to have one more relatively trustworthy source to consult. If you feel the same way, then you might enjoy The Wirecutter, "a list of the best technology to buy as determined by dozens of hours of research and testing." It's already helped me narrow down my choices in shopping for a podcasting mic (yup, an MJ podcast is coming soon*).
What would you use it to shop for? What other review sites do you count on?