That's interesting. I can't reach wikileaks.ch from my home connection, or from one linode instance, but it is available through a second linode instance (in Dallas):
https://www.refheap.com/paste/4309
These are the servers that are failing to relay packets, all of which respond to ping:
po-10.sto1.se.portlane.net (80.67.4.128)
te-4-4-gblx.sto1.se.portlane.net (209.130.172.178)
149.11.24.18 (149.11.24.18)
The admins of these servers may be working with Wikileaks to stop the deluge of packets from the IP blocks with the most attackers, or they are simply dropping the packets to conserve resources.