Lunch Box Reviews is a busy little website that reviews mostly iTunes products (apparently Android apps are coming soon!) and allows users to post their own reviews.  Apps are arranged by Platform, Age and Category, and they also have handy dandy search functions that allow you to refine your search.  You can save lists of your own apps, and they post the “Top Ten Best Of” lists daily.  They maintain a blog and a What’s New section for keeping up with the most up-to-date stuff.