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.
Edit: I got this E-Mail from Zach Chadwick, a (the?) "Lead Developer" at Cloudshark signaling a wish to contribute to the discussion and the project, if it happens to become one:
We found your post earlier today on ServerFault and we'd be totally into something like that for the community.
We don't have anybody that has enough points to contribute to the discussion, nor do we know how to go about getting in touch with the devs over there. For now, we love people using CloudShark.org to share captures and simply embedding the URL in their questions and answers on ServerFault.
We're happy to keep the discussion going, or if you have any contact with their developers, we'd love to chat about making it easy to embed files somehow on their sites.