Looks like 1 World is offering another bonus. This time you have to arrive in all 6 continents to get the 100,000 mile bonus. This should make it harder to get the bonus with weekend trips, but I think will make it much cheaper over all if you go for the bonus on all 8 carriers.

Round trips between MIA and CCS (1200 miles) will give you 2 continents, Casablanca and Madrid (600 miles) 2 more, and Darwin and DPS (1100 miles) will give you the requred 6. Total Cost would be under 1000 bucks.

Anyone know of any shorter routes?

rich