One source that I have been rather impressed with is World Beer Direct's Beer of the Month Club. I have been on The Connoisseur plan for the better part of 2 years now, and only once have I received a shipment which contained a beer that I had previously had the pleasure of trying. I especially look forward to the 2 international inclusions, because it is likely I have never even heard of the brews before I am graced with their presence. About the 10th of every month I get a hop in my step (which ain't easy when you've got MS, le' me tell ya) in anticipation of the unkown delights I am about to indulge. :-)

Here is an excellent site devoted to the pursuit of the finest beers in the world: BeerMe.com (I only wish I had the resources to do what this guy can).

Here are some other beer site databases that have a variety of information, ratings and opinions on the subject: