The February 1 rolling poll is the first with Edwards completely removed. If you take the 12% Edwards had on the last day of his campaign, you see that Hillary rose 6%, Obama 5%.
Clinton up 4%, Obama up 5%, with Edwards eliminated from the poll.
In both surveys, we see the vote pretty much evenly split. The problem, you can't just isolate this one factor as completely reflective. However, there is nothing to suggest that Edwards supporters have moved on masse to any one candidate.