You can create an account anonymously and pay in Bitcoin, and not leave a paper trail. That's exactly what I did.
Their policies state that they do not log, but I personally find this questionable. Much torrent traffic goes through their network, and I couldn't imagine how they respond to complaints sent by media companies to their US servers. They claim that they use "proprietary technology" to deal with abuse, but that seems only to be with blocking outgoing DoS attacks.
However, policies of "not logging" aren't particularly new to [many providers](http://torrentfreak.com/which-vpn-providers-really-take-anon...), so I'm not really concerned.
It may also be useful to note that they've been supportive of the Bitcoin community. They host BitcoinTalk, and were also one of the first VPNs to accept Bitcoin.