This is a basic configuration for Edgerouter with EdgeOS 1.7, dual WAN Failover and two AWS VPC VPN connections routed with BGP.
WAN1 : ETH0 with pppoe and static IP
WAN2 : ETH1 with DHCP and dynamic IP
LAN : ETH3
From the VPC - VPN Connections, you can downlad the configuration for Vyatta software and apply it directly to the router, as they are compatible.