Fox News/Opinion Dynamics, more or less in line with other polls:

According to a poll by Opinion Dynamics released by Fox News. 34 per cent of respondents would vote for the New York senator in a primary, down nine points since January.
Illinois senator Barack Obama is second with 23 per cent, followed by former U.S. vice-president Al Gore with 14 per cent, and former North Carolina senator John Edwards with 12 per cent.

Obama hasn’t quite caught up with Hillary in the polls, but he seems to be catching up fast.