All of the polling raw-data is stored at the Electoral Statistics section of politicalhotwire.com.
It is all hyperlinked.
I will post the running averages - per week, also here at my blog.
The rolling average is:
polls no older than seven days
simple average, no weighting.
2012-09-013 Thursday / Average: Obama +4.09
2012-09-014 Friday / Average: Obama +3.81
2012-09-015 Saturday / Average: Obama +3.81
2012-09-016 Sunday / Average: Obama +3.81
2012-09-017 Monday / Average: Obama +3.93
2012-09-018 Tuesday / Average: Obama +4.00
Also, there is a complete polling repository for the 2012 National Polling HERE at Electoral Statistics.