I've seen so many of these VPN-for-rent services that this is becoming an obligatory reply. But I don't see anyone saying "ssh" on the comments yet, so:
Except it wouldn't be OpenCloak... it'd be OpenCloakForPeopleWhoHaveShellAccountsOnServersSomewhere, which is much less useful to your average -- but security-conscious -- user.
Sidestep is a pretty-ish (OS X only) UI for SSH tunnelling - it can be set to auto-activate whenever it detects you're on an unsecured wifi network - like your local coffee shop.
Here's how to tunnel on OSX via ssh:
Then when you're done: That will set your ssh server as the system-wide socks proxy.Granted I don't have the time to wrap a pretty UI around it, but those commands work, and I trust my own servers more than any service.
If anyone does have time to wrap a pretty UI around it... OpenCloak could exist mere hours after the commercial project went into beta :)