As of a few days ago, there is. A poster over at Backpacker Magazine's Gear forum is putting a web page together. Here it is. It's a work in progress and akehrer is very open to new input, so if you want to be part of the fun, join us at the thread titled "EN13537".
For ratings not yet listed on akeher's site, you can go here to access the individual sites of members of the European Outdoor Group. Bag ratings are listed on each site.