We've loaded 1,000+ hand picked logos from our collection of 50,000. You can see them at
http://designer.realtimedesigner.com/stickerz - just add a clip art to the design. We'll be glad to add others by request, but all 50,000 surely becomes cumbersome to navigate and most are obscure.
Also, we created thumbnail images for the clipart categories and added keywords to the 10,000+ library. And, now that we are finally using the keywords, Alex added ANY/ALL/EXACT search options to clip art.
The Logo clip art and the thumbnails will become standard issue on new RTD sites. Existing clients will need to personally request us to update their sites. I don't want add anything to someone's site that they might not want.