Just started getting into this a few months ago...
Earned:
Amex Platinum 100k
Chase Sapphire Preferred 50k
Citi/AA x2 150k
Continental 50k
Total earned from bonuses: 350k
Burned:
LH r/t in Y, NYC-LIS 110k (2 tix)
DL r/t in Y, NYC-IAH 32.5k
Total burned: 142.5k