Wikipedia says that a torrent tracker is
... a special type of server that assists in the communication between peers using the BitTorrent protocol.
The "tracker" server keeps track of where file copies reside on peer machines, which ones are available at time of the client request, and helps coordinate efficient transmission and reassembly of the copied file.
Related to this question about open data torrents, are there any existing torrent trackers that would be appropriate for open data. If not, is there any organization that we could petition to create an open data tracker?
There are several comprehensive and curated lists of public trackers (for example), but for data that's completely legit, it'd be good to have stable and reliable trackers.