Hi Rob,
I don’t have a separate tutorial for it but I can explain how to do it here:
R1(config)#ip route 0.0.0.0 0.0.0.0 null0
R1(config)#router eigrp 1
R1(config-router)#redistribute static metric 1 1 1 1 1 route-map DEFAULT_ONLY
R1(config)#route-map DEFAULT_ONLY permit 10
R1(config-route-map)#match ip address prefix-list DEFAULT_ROUTE
R1(config)#ip prefix-list DEFAULT_ROUTE permit 0.0.0.0/0
The default route to the null0 interface is only needed if you don’t have a default route in your routing table. The route-map with prefix-list is used to make sure that only the default route gets redistributed.
Rene