I have a server setup with NAT/VPN and DNS. I can connect to the VPN server, but I can't find computers on the LAN. Any ideas? What should the DNS zone name be set to? The server is in a workgroup, so I name the zone name workgroup.

You connect with a vpn client ? If yes, netbios broadcast is not forwarded, your network neighborhood on your computer will list only computer near you. If the server sit in the same LAN as you, then check firewall setting.MCP | MCTS 70-236: Exchange Server 2007, Configuring

When you connect to VPN server all network traffic send to it. You must add statics route on your clients.Mohammad Javad Bagdeli

The problem was my WINS server was pointing to the wrong address for the system I was trying to access on the remote network. I added static entries to the WINS server and that fixed the problem. Thanks!