Thanks John Piper!
Today, Desiring God gave me permission to include their great resource of commentary recommendations on BestCommentaries.com. This is great because it will help populate the initial dataset of recommendations.
On a side note, I really appreciate the openness of John Piper's ministry. At the bottom of every page, they have the following notice:
Permissions: You are permitted and encouraged to reproduce and distribute this material in any format provided that you do not alter the wording in any way and do not charge a fee beyond the cost of reproduction. For web posting, a link to this document on our website is preferred. Any exceptions to the above must be approved by Desiring God.
I emailed asking for permission to "atler the wording" by changing the list into ratings, and they quickly responded saying that I could do so. The body of Christ is wonderful.