I came across a really cool website yesterday. It has likely been around for some time, but I just found it. BestCommentaries.com is a website devoted to reviewing biblical commentaries. The coolest thing about the site is that it has reviews done by leading Bible scholars like D. A. Carson and Tremper Longman, III. So, if you want to know what these guys (and others) think of a certain resource, just take a look at their reviews!
The site also gives collective ratings based upon several sources as well as links to where you can purchase each title and its price. If you are in the market for Bible commentaries, I think it is worth your time to check it out.