I2P doesn't work very well as outproxy to surf the regular Internet. There's just one outproxy as far as I know.
Tor (http://tor.eff.org) is built to work mainly as an outproxy, but depending of what outproxy you land in, you might hit a wall: the Great Chinese Firewall, the censorship in Australia, etc.
A better alternative seems to be a VPN from IPREDator (https://www.ipredator.se/?lang=en), by The Pirate Bay folks, so your traffic gets routed to Sweeden, where there is no censorship (yet). IPREDator costs €5 a month.