Swedish ISP Bahnhof, which among other sites hosts Wikileaks in Sweden, plans to have all of their traffic go through a VPN service. As a result nobody could request IP addresses of site visitors, since even the hosting company doesn't have them.
Picture related: It's the entrance to the ISP's data center, located in a former nuclear bunker in a mountain. These people are like James Bond villains except that they're good guys. It's awesome!