It all depends on what aluminum it is.. who knows what aluminum was represented in that graph on wikipedia.. but for the right price, I bet you can get some rods made out of 7075-T6 or an even stronger alloy.
EDIT - Aluminum rods are still a maintenance item
http://rrconnectingrods.com/aluminum...K0saAh9z8P8HAQ
EDIT 2 - More info
http://www.dragzine.com/tech-stories...yths-with-grp/
Moral of the stories are if you want long life, don't go aluminum.