Courtesy of Nate Silver:
[T]he pro-gay marriage group No on 1 Protect Maine Equality has raised more than $2.30 million in itemized contributions from outside the state of Maine; this is more than the $1.82 million that Stand for Marriage Maine has raised from out-of-state.
However, most of No on 1's advantage is based on its substantial edge in fundraising from within the state of Maine. No on 1 has raised $1.89 million from 3,766 unique contributors within the state, whereas Stand for Marriage Maine has raised just $677,000 from 422 contributors, putting it at nearly a 3:1 disadvantage. All told, No on 1 has raised 43 percent of its funds from within Maine, as compared with 26 percent for the Yes on 1 campaign.