@rafi: Regarding the DNA features in 2.1: - The exact functionality and interaction with uT The user can now start "DNA" downloads by entering a url into their browser, or clicking on a link of the form: http://127.0.0.1:10000/proxy?url=http://borft.student.utwente.nl/openoffice/torrents/OOo_2.1.0_Win32Intel_install_ga.exe Sort of like the Coral CDN: http://www.coralcdn.org/ The idea is: uT will contact the Bittorrent offices, we will generate a torrent for you, send it to the client, and setup the seed correctly. - the possible user-control over it (enabled/disable) You have lots of options. In Preferences, you can turn it off, or limit the amount of DNA data transferred. Alternatively, you can just not click on DNA-type links. - the estimated overhead caused by it (CPU, bandwidth, RAM) None, really. It's just a regular torrent - oh, except those torrents only contain one file. The main advantage is that people who want to share a piece of content that is already on the web don't need to go to the trouble of creating a torrent and setting up a tracker. I think we also provide statistics reporting on your "DNA" torrents, too. Everyone in the office, from Bram and the CEO, down to the marketing dept. (OK, there's only one person in that dept.), to the programmers, agrees that we are not going to use any client bandwidth unless you the user decide to participate in that swarm. A use case for this type of thing is, movie trailers - It's a piece of commercial content, but only those interested in seeing the clip participate in the swarm, sharing a bit of their upload bandwidth in return for increased download speeds, just like regular torrents. - any known security/privacy issues Yes - when you load a DNA torrent into your client, your client connects to a tracker that we run here at BitTorrent. This is the same as any other torrent you download - if you activate the torrent, you connect to one of the trackers in the list. All DNA torrents are clearly marked, and in fact, we went to quite a bit of trouble to not even show the DNA category if you don't have any DNA torrents active, so it won't be annoying. Thanks for your question.