I very much like what Cloudshark is doing with PCAP traces and would like to see more integration into the main site similar to how images are handled but with the ability to scroll through the capture while reading the question (pcaps mostly will be attached to questions):

Why? Since PCAP traces would help debugging many classes of network-related problems, facilitating access to the traces would add to the value of the site. It also does have a "you are in the matrix" look to outsiders and thus is highly professional. There is a good chance that Cloudshark would be interested in promoting their service through SF and proactively cooperate in integration efforts.