The good folks over at TAO Security have launched OpenPacket.org 1.0 that allows security professionals to share packet captures of various types of network traffic so people can learn what they look like and be able to identify it if it happens on their network. The dumps are divided up into three categories, Normal, Suspicious, and Malicious so you can quickly find what you're looking for whether you're evaluating some traffic you've captured on your network or if you're just looking around out of curiosity. You can view the files in Ethereal/Wireshark, tcpdump, snort, etc.

This is the first time a website has served this purpose and it was sorely needed. Now more people can learn how to look at traffic dumps efficiently than ever before. The best thing about it is that anyone can submit new traffic dumps so the variety of available information will be expanding rapidly.