I found this...
http://electionupdates.caltech.edu/?p=2255National Early Voting
Fox News (11/1-11/2) (29% of sample)
Obama 48% (+1)
McCain 47%
NBC/Wall Street Journal (11/1-11/2) (30% of sample)
No breakdown of early voters. Text says: “The early voters’ views reflect to overall electorate’s.” Obama leads by 8 points, 51%-43% in the overall poll.
Diageo/Hotline (10/31/11/2) (27% of sample)
Obama 51% (+5)
McCain 46%
CBS/NYT (10/29-10/31) (20% of sample)Obama 57% (+19)McCain 38%NOTE: The Final CBS poll, taken 10/31-11/2, included 24% who had already voted, but CBS did not provide a separate breakdown of who they voted for.
Diageo/Hotline (10/30-11/1) (27% of sample)Obama 51% (+5)McCain 46%
Pew (10/30-11/1) (26% of sample)Results of already voted not reported separately
Democracy Corps (10/30-11/2) (22% of sample)Results of already voted not reported separately
ABC/Wash. Post (10/29-10/31) (16% of sample)Results of already voted not reported separately
Zogby (10/30-11/1) (?% of sample)Obama 56% (+17)McCain 39%
Gallup (10/30-11/2) (28% of sample)No data, but Gallup says the results “skew toward Obama”
Gallup (10/27-10/29) (21% of sample)Obama 55% (+15)McCain 40%
CBS/NYTimes (10/25-10/29) (17% of sample)Obama 55% (+20)McCain 35%
Fox News (10/28-10/29) (22% of sample)Obama 52% (+9)McCain 43%
Hotline/Diageo (10/27-10/29) (19% of sample) Obama 55% (+19) McCain 36%
Economist (Oct. 25-27) (23% of sample) Obama 59% (+18) McCain 41%
ABC/Wash. Post (Oct. 26-29) (11% of sample) Obama 59% (+19) McCain 40%
Harris (Oct. 20-27) (12% of sample) Obama 51% (+9) McCain 42%
Gallup (Oct. 25-28) (18% of sample) Obama 53% (+10) McCain 43%
Diageo/Hotline (Oct. 25-28) (17% of sample reports having already voted; no breakdown of how they voted.)
Pew (Oct. 23-26) A national Pew survey of roughly 1500 voters found that 15% had already voted, but did not provide a breakdown of who they voted for.