Depends on what you're after. I've set up a few VPNs with OpenVPN, even in somewhat strange circumstances (http://e1ven.com/2007/11/26/giving-all-players-routab

Depends on what you're after. I've set up a few VPNs with OpenVPN, even in somewhat strange circumstances (http://e1ven.com/2007/11/26/giving-all-players-routable-ip-addresses/ http://e1ven.com/2007/11/26/giving-all-players-routable-ip-a...) and it's very flexible, but the Windows drivers don't always play nice with new versions of Windows. Win7 was broken for a while, and 64 bit drivers were difficult to make work. I'd use a PPTP vpn where possible, since it's very easy to setup, cheap, and everything supports it or a Cisco ipsec VPN with a RSA-2-factor device if you want to lock things down. Hamachi is.. Easy. Very, Very, Very easy. Outside of that, there isn't really advantage. Never heard of Remobo- Could be interesting, but there isn't much information on their site yet; Are there limits on users? Data? How do they make money to run the VPN servers?