To mention an option specifically suited for PCAP dump files, [Cloudshark][1] seems to be a sensible choice. It has been around for some time now, is constantly extending the services, does not require to sign up to upload dumps and not only *hosts* dumps but also allows for viewing and analysis via an AJAX interface:

[![Cloudshark interface][2]](https://i.sstatic.net/sbA86.png)


  [1]: http://www.cloudshark.org/
  [2]: https://i.sstatic.net/sbA86.png