Latest Free VPN service :ProXPN

ProXPN is a new VPN service which creates a highly secure environment between your computer and the internet. This VPN service helps hide your identity and online activity. It also allows you to get access to blocked websites by hiding the real website IP address.
Unlike a proxy network, no records of your online activities are made and no one can spy on your IM, email or calls.
Features of ProXPN
More security through military grade high bit encryption
More privacy thorough secure connections.
Internet activity cannot be tracked by our ISP.
Real IP address is hidden and hard to uncover.
Quick installation and user friendly.
Works with iPhone, iPod Touch and Windows Mobile.
Supports Windows XP, Vista and 7

Link : ProXPN