From Ebone's own pages, BT is listed as a customer to Ebone, and it is
said the IBM and EUnet have transit agreements with Ebone. I can't
find any direct text stating Ebone's peering policies, but on the
Amsterdam IX page (http://www.ams-ix.net/) the following is said:
Policy: Does generally not peer except with other larger ISPs after
negotions. Become a member and we'll peer with you!