Logobook is a growing catalog of “the finest logos, symbols & trademarks” in the world. The 5000+ logos are divided into groups like letters & numbers, shapes, animals, objects, and nature and are extensively categorized by industry, designer, and country of origin. Great resource.
They’re backed up with new submissions right now, but you can still send them your logos and they’ll get back to you when submissions are open again. (via @buzz)