I have been working on a project that involves podcasting BitTorrent files using BT clients that support DHT (based on Kademlia distributed hash table). DHT allows for trackerless distribution. Currently there are only 4 clients that I have found that support DHT:
BitTorrent
Azureus
BitComet
BitSpirit
Azureus uses DHT but its version is not compatiable with the BitTorrent client. More information can be found here. I have not tested BitComet or BitSpirit but hope to do so soon.
Interestingly, Azureus has a RSS plugin for downloading podcast torrent files. I hope other client apps follow suit.