osm-torrent (discontinued)
OpenStreetMap planet torrent proof-of-concept implementation
update (2020-11-24)
Official OSM bittorrent support has now been implemented: See openstreetmap/operations#451
So please help to seed the swarm and keep it healthy!
Historical
For historical information, see: see https://trac.openstreetmap.org/ticket/137 and https://trac.openstreetmap.org/ticket/1725
Live service on http://osm-torrent.torres.voyager.hr/ has been shut down as of 2014-09-15.
Archiving code if anybody wants to pick it up...