But, why would you do a VRF and then decide you wanted to route from that VRF to your global routing instance? And why on earth would you want to NAT between two interfaces in different VRF's.
Well, I did end up needing to and this article was very helpful.
ip vrf MyVRF exit interface (no switchport) ! make routed port ip vrf forwarding MyVRF ! associate interface with MyVRF ip address A.B.C.D M.M.M.M interface switchport switchport trunk encapsulation dot1q (switchport nonegotiate) switchport mode trunk vlan 10 name WAN-VLAN interface Vlan10 ip vrf forwarding MyVRF ip addr E.F.G.H M.M.M.M ip nat enable ! now the VRF-aware NAT config: interface ip nat enable interface Vlan10 ip nat enable ip access-list standard LAN-to-NAT permit ip nat source list LAN-to-NAT interface Vlan10 vrf MyVRF overload ! finally the def. route ip route vrf MyVRF 0.0.0.0 0.0.0.0