Fido-net style....... aha,.... yes we are on the same page again. Had to go back in memory for that one.
Some information is given on the costs during the talk, you can find links to the video archive of the talks at https://wiki.har2009.org/page/Media
some of the pages are currently down I think because the event network is down however servers should be on the move back to the datacenter. Some of the links are currenlty working so you can already have a peak.
You are in a maze of little twisting passages, all different.