the Now-cast is now up to 78.6%
You can see the details at his blog
here are the probabilities by states
WI 86% for Obama
NV 79
OH 76
IA 72
NH 70
CO 57
VA 54
FL 37
NC 18
At 76% or above, Obama has 271 EVs
at 70% or above, Obama has 281 EVs
at 54% or above, Obama has 303 EVs
the trend towards Obama continues, even with polls from the likes of Rasmussen included at the state level
NOTE - Purple Strategies oversampling in OH, CO, and VA ARE included in the analysis