Obama Takes Huge Lead In National Tracking Polls

From DailyKos comes the data for the four daily tracking polls (rolling averages of data from 3 consecutive days).

Obama McCain MoE +/- RV/LV
Research 2000:  50 (49)   43 (43)   3     LV
Rasmussen:      50 (50)   44 (44)   2    LV  
Diageo/Hotline: 47 (48)   42 (43)   3.2    RV
Gallup:         50 (49)   42 (44)   2      RV