Is anyone successfully running OpenVPN with Active Directory integration? Are you using the openvpn.net or the openvpn.net/opensource version of OpenVPN? Any tips, tricks or gotchas or did it "just work?" (yes, I've seen this How To but sometimes how tos aren't as simple as they look for me).
Backstory: I have a very old Cisco Concentrator (3000 series) that needs to be replaced. I'd like the replacement to be something that integrates with AD user/passwords. I have a stack of reasonably modern HP DL320 boxes laying around and that led me to the OpenVPN idea...