These are the Cisco VPN related packages that I believe are needed for my Ubuntu 7.10 Desktop:
network-manager, network-manager-gnome, network-manager-vpnc, vpnc
As a side note, I ended up not using vpnc. I ended up using the Cisco 4.8.00.0490-k9 client code and patching it. Basically, I ended up following the instructions as documented by "peteguhl" here:
Howto: Cisco VPN client on x86_64
I am almost tempted to paste a complete copy of those instructions here, but I'll hold off on that for now.
The control script is here: /etc/init.d/vpnclient_init
To connect, issue: "vpnclient connect <profile_name>"