I've just installed OpenVPN (on both FC3 and slackware 10.1) and everything works just fine. It was really easy and after their saying OpenVPN is very good/secure ( http://www.sans.org/rr/whitepapers/vpns/1459.php ).
If OpenVPN is so great why should anyone bother with IPsec?
Could you tell me some advantages of IPsec(openswan) over TLS based VPNs (OpenVPN)? (if there is any....:)